I started paying attention to buildings on a trip to Barcelona in 2019, when a friend who studied architecture pointed out that the apartment block across from our tapas bar was a Puig i Cadafalch design — not a Gaudi, but from the same era and movement, and equally brilliant in its own way. That moment changed how I travel. Buildings tell you things about a city that no museum placard or walking tour can — they reveal what a society values, how it organizes itself, what materials and skills it possesses, and how it wants to be seen by the world. I've since taken architecture-focused walking tours in more than twenty cities, and the experience has consistently given me a deeper understanding of each place than any other type of sightseeing.
"Architecture should speak of its time and place, but yearn for timelessness." — Frank Gehry
Barcelona: The Modernista Trail
Barcelona is the obvious starting point for any architecture-minded traveler, and for good reason — the concentration of Modernista buildings in the Eixample district is unmatched anywhere in Europe. Antoni Gaudi gets most of the attention, and the Sagrada Familia (tickets from 26 euros, book online weeks in advance) deserves every bit of it, but the city is filled with other architects from the same movement whose work is equally extraordinary. The Block of Discord on Passeig de Gracia contains three buildings by three different architects — Gaudi's Casa Batllo, Lluis Domenech i Montaner's Casa Lleo Morera, and Puig i Cadafalch's Casa Amatller — all built within a few years of each other, all competing for the most extravagant facade.
I took a two-hour Modernista walking tour through the Barcelona Architecture Centre (COAC), which costs 18 euros and departs from their headquarters in the Placa Nova. The guide, a practicing architect named Marta, focused on the details that I would have walked past entirely — the wrought-iron balcony designs that reference Catalan folklore, the mosaic patterns that encode political messages about Catalan identity, the structural innovations like the catenary arches that Gaudi developed by studying how hanging chains distribute weight. The tour covered eight buildings and included interior visits to two of them.
For independent exploration, the Ruta del Modernisme pass, available at the COAC or online for 15 euros, provides discounted entry to twelve Modernista buildings, including the Palau de la Musica Catalana (Domenech i Montaner's concert hall, which I consider the single most beautiful interior space in Barcelona), the Sant Pau Recinte Modernista (a former hospital complex with pavilions covered in colorful tilework), and the Casa Vicens (Gaudi's first major commission, which opened to the public in 2017 after years of restoration). The pass is valid for one year, so there's no pressure to visit everything in a single day.
Chicago: The Birthplace of the Skyscraper
Chicago's architectural significance is hard to overstate. This is where the steel-frame skyscraper was invented in the 1880s, where Frank Lloyd Wright developed the Prairie School, where Mies van der Rohe built his first American buildings, and where the postmodern movement took shape in the 1980s. The Chicago Architecture Center (CAC), located in a riverfront building at 111 East Wacker Shape, offers the single best architecture tour I've experienced anywhere in the world — the Chicago River Cruise, a ninety-minute boat tour that costs $55 and passes more than forty significant buildings while a CAC docent explains their history, design, and context.
I took the river cruise on a Thursday afternoon in September and was stunned by how much I learned. The docent, a retired structural engineer, explained how the Monadnock Building on Jackson Boulevard (1889) was the tallest load-bearing brick building ever constructed — its walls are six feet thick at the base — and how the nearby Reliance Building (1895) pioneered the steel-frame construction that made modern skyscrapers possible. Seeing these buildings from the water, where you can appreciate their facades and their relationship to each other, is far more revealing than walking past them on the street.
For a self-guided experience, the CAC's free Open House Chicago event, held annually over a single weekend in October, opens the doors of more than 250 buildings across the city, including spaces that are normally closed to the public — corporate boardrooms, private clubs, rooftop gardens, and architect studios. I attended in 2024 and got to stand on the 42nd-floor outdoor terrace of the Inland Steel Building, a 1958 modernist masterpiece, and walk through the Rookery Building's light court, which was redesigned by Frank Lloyd Wright in 1905. The event is free, but popular sites require advance registration.
Brutalism in Belgrade: Concrete and Contradiction
Belgrade has one of the highest concentrations of brutalist architecture in Europe, a legacy of Yugoslavia's postwar construction boom under Josip Broz Tito. The city's brutalist buildings — raw concrete structures with bold geometric forms — were built as expressions of optimism and modernity, and they remain some of the most striking and controversial structures in any European capital. I joined a three-hour brutalist walking tour organized by the Belgrade Architecture Tours group, which costs 15 euros and departs from the Republic Square. The guide, a young architect named Marko, was passionate and knowledgeable, and he framed the buildings within the political context of postwar Yugoslavia in a way that made them far more meaningful than they would have been on their own.
The tour's highlight was the Western City Gate, also known as the Genex Tower, a 35-story twin-tower structure connected by a two-story bridge at the top, designed by Mihajlo Mitrovic in 1977. One tower is residential, the other was offices, and the connecting bridge once housed a rotating restaurant that is now closed. The building stands at the entrance to the city like a monumental gateway, and its raw concrete facade, now weathered and stained by decades of Balkan weather, has a brooding beauty that photographs cannot fully capture. Marko told us that the building is controversial among Belgraders — some see it as an important piece of heritage, others as an ugly reminder of a failed political system.
Other notable stops included the Sava Centar conference hall, a massive concrete structure with a sweeping roofline that houses one of the largest auditoriums in southeastern Europe, and the Karaburma housing complex, a residential brutalist development where the concrete facades are decorated with mosaic patterns inspired by Byzantine art. The tour ended at the Museum of Contemporary Art, itself a brutalist building designed by Ivan Antic and Ivanka Raspopovic in 1965, with a glass-and-marble facade that contrasts with the raw concrete of the surrounding structures. Entry to the museum costs 400 dinars ($3.50).
Art Deco in Mumbai: The Indo-Deco Style
Mumbai has the second-largest collection of Art Deco buildings in the world, after Miami Beach, and the city's version of the style — known as Indo-Deco — incorporates Indian motifs, tropical materials, and local craftsmanship into the geometric forms and streamlined aesthetics of the international Art Deco movement. The Marine Shape seafront, a curved boulevard along the Arabian Sea, is lined with pastel-colored Art Deco apartment buildings built in the 1930s and 1940s, and the area was designated a UNESCO World Heritage site in 2018. I took a two-hour walking tour through Art Deco Mumbai, an organization founded by architects Atul Kumar and Alisha Sadikot, which costs 1,000 rupees ($12) and covers the Marine Shape area and the nearby Oval Maidan.
The tour started at Eros Cinema, a streamlined building on the Churchgate end of Marine Shape that combines Art Deco styling with Indian decorative elements — the facade features lotus motifs and geometric patterns inspired by Mughal architecture. The cinema, built in 1938, still operates as a single-screen movie theater, and the interior retains its original pink marble lobby and geometric light fixtures. Atul explained that Mumbai's Art Deco boom was Guide by the city's growing merchant class in the 1930s, who wanted modern homes that reflected both their international aspirations and their Indian identity.
The buildings along Oval Maidan, a large cricket ground in the Churchgate neighborhood, include some of the finest examples of Indo-Deco residential architecture. The buildings feature elements like projecting balconies with concrete balustrades, stylized sunburst motifs on parapets, and decorative grilles with patterns derived from traditional Indian jali screens. Many of these buildings are still residential, and the residents' cooperative societies maintain the facades with varying degrees of fidelity to the original designs. The tour includes entry to one of the building lobbies, where you can see original marble floors, stained glass panels, and elevator doors with Art Deco metalwork.
Ancient to Ottoman: Istanbul's Layered Architecture
Istanbul is the only city in the world that straddles two continents, and its architecture reflects the collision and fusion of Roman, Byzantine, Ottoman, and modern Turkish cultures across more than 1,700 years. I spent a week exploring the city's buildings and found that the most rewarding approach was to focus on specific neighborhoods rather than trying to see everything at once. The Sultanahmet district contains the densest concentration of major structures — the Hagia Sophia (free entry, though the upper gallery requires a separate ticket of 1,300 lira / $40), the Blue Mosque (free, but closed to tourists during prayer times), and the Topkapi Palace (750 lira / $23) — but the Fatih and Beyoglu districts offer equally rich architecture with far fewer tourists.
I hired a private architecture guide through Istanbul Tourist Guides for $80 for a half-day tour of Byzantine and Ottoman structures in the Fatih district. The guide, a retired civil engineer named Ahmet, took me to the Chora Church (Kariye Museum), a small Byzantine church with some of the finest surviving Byzantine mosaics and frescoes in the world, and to the Suleymaniye Mosque, designed by Mimar Sinan in the 1550s and widely considered the greatest work of Ottoman architecture. Ahmet explained how Sinan used the Hagia Sophia as his reference point but improved upon its structural engineering — the Suleymaniye's dome is slightly smaller but more stable, and the interior feels more harmonious because the supporting elements are more gracefully Combine.
The Balat district, on the Golden Horn, offers a different perspective entirely — a neighborhood of colorful wooden houses, Greek Orthodox churches, and Ottoman-era synagogues that reflects Istanbul's multicultural past. I wandered through the streets on my own for an afternoon, photographing the peeling paint, the cobblestone lanes, and the ironwork on the doors. The area is gentrifying rapidly, and several of the old houses have been converted into cafes and boutique hotels, but enough of the original fabric remains to give a sense of what the neighborhood looked like a century ago.
Prague: From Gothic to Cubist
Prague's architectural heritage spans from the Romanesque to the postmodern, and the city center is compact enough that you can walk between buildings from radically different eras in a matter of minutes. The Old Town Square, with its Gothic Church of Our Lady before Tyn and its Baroque St. Nicholas Church, is the most obvious starting point, but I found the most interesting architecture in the neighborhoods just outside the tourist core. The Vinohrady district, a ten-minute tram ride from the Old Town, is filled with Art Nouveau apartment buildings with ornate facades, stained glass windows, and decorative ironwork that rival anything in Vienna or Budapest.
Prague has a distinction that no other major European city can claim: it has a significant collection of Cubist buildings, a style that flourished briefly in the 1910s and exists almost nowhere else in built form. The House of the Black Madonna, designed by Josef Gocar in 1912 on the corner of Celetna Street, is the most famous example — its facade features angular, faceted stonework that applies Cubist painting principles to architecture. The building now houses the Czech Museum of Cubism, and entry costs 250 koruna ($11). I also visited the Cubist lampposts on Jungmannovo Namesti, a small square near Wenceslas Square, where even the street furniture was designed in the Cubist style.
The Dancing House, designed by Frank Gehry and Vlado Milunic in 1996, stands on the riverfront near the Charles Bridge and remains one of the most controversial buildings in Prague. Its deconstructivist form, which resembles two dancers (Fred and Ginger), was initially despised by many Prague residents, who considered it an insult to the surrounding historic architecture. I found it more interesting as a conversation piece than as a building — the contrast between its fluid forms and the rigid neoclassical and baroque structures on either side is striking. There's a rooftop restaurant with views of the Prague Castle, and a small gallery on the ground floor that is free to enter.
Tips for Planning Your Own Architecture Tours
The best architecture tours I've taken have been led by practicing architects or architectural historians, not general tour guides. The difference is enormous — a knowledgeable guide can explain why a building was designed the way it was, what structural and aesthetic problems the architect was trying to solve, and how the building relates to its cultural and political context. Before booking any architecture tour, check the guide's credentials and read recent reviews. Organizations like the Chicago Architecture Center, Art Deco Mumbai, and the Barcelona Architecture Centre are run by or employ actual architects, and the quality of their tours reflects that expertise.
Timing your visits around light conditions makes a significant difference in how you experience architecture. I've found that early morning and late afternoon provide the most revealing light for exterior photography and observation, because the low angle of the sun creates shadows that reveal surface textures, structural details, and three-dimensional forms that flat midday light washes out. For interiors, visiting during off-peak hours — typically mid-morning on weekdays — means fewer crowds and more space to observe and photograph. Many significant buildings are free or very cheap to enter, so you can visit them multiple times at different times of day if you want to study them in different light.
Before visiting any city with an architecture focus, I spend an evening watching documentaries and reading about the key buildings and architects. The 'Architects' series on YouTube, produced by the Royal Institute of British Architects, offers excellent short films on individual architects and buildings. For deeper reading, the 'Architecture of the World' series published by Taschen provides accessible introductions to the architecture of specific cities and countries. This background preparation transforms the experience from looking at interesting buildings to understanding what you're seeing and why it matters.
