10 Best Iconic Architecture (Costs & Tips, 2026)

Still unfinished after more than 140 years — Gaudí knew he wouldn't live to see it completed, and construction is genuinely still ongoing. The exterior is free to walk around and arguably the more overwhelming view; going inside costs €26–40 depending on how far up the towers you want to climb.

Frank Lloyd Wright built a house directly over a waterfall rather than facing it — a decision that still looks radical decades later. A guided tour costs around $32, and it's the only real way to see it properly; there's no honest free-viewing version of this one, but it's widely considered his masterpiece for a reason.

This one building revived an entire declining industrial city so dramatically that urban planners now call it 'the Bilbao effect.' The titanium exterior is free to walk around at any hour; going inside to see the actual art costs around €13, which is honestly the less interesting half of the experience.

Formerly the tallest buildings in the world, and the twin-tower skybridge design is still one of the most recognisable skylines anywhere. Viewing from KLCC Park is free and arguably better at night when they're lit; the skybridge observation deck costs around $30 and books out days ahead.

Three towers holding up what looks like a ship balanced 200m in the air — it photographs like a rendering even in person. Free to view from Gardens by the Bay or the waterfront; the SkyPark observation deck on top costs around $23, though you get roughly the same view for free from the infinity pool bar if you buy one drink.

Built over 1,000 years ago, 3,500 narrow steps descending in perfect symmetrical zigzags to collect water — it looks more like an Escher drawing than an actual functioning building. Entry costs next to nothing (under $1), and it's still one of the most photographed pieces of ancient architecture in India.

A student's master's thesis, built for real for Expo 67, stacking 354 identical concrete cubes into something that still looks like the future of housing decades later. Free to view from the Old Port or across the water — you can't go inside, it's still occupied as private apartments.

No straight lines anywhere, uneven floors on purpose, trees growing out of the windows — architect Friedensreich Hundertwasser considered straight lines 'the devil's tool.' Free to view from outside; it's a functioning apartment building, so no interior access, but the exterior alone is worth the detour.

Locals call it 'big pants' for obvious reasons once you see the two leaning towers meet at an angle overhead — the engineering to make that structurally possible took years to solve. Free to view from the street; no public interior access, this is a working broadcast headquarters.

Nicknamed for the way the two towers appear to be caught mid-dance — one leaning, one straight, curving around each other. Free to view from Rašínovo nábřeží along the river; there's a rooftop bar inside now if you want the view from the other direction for the price of a drink.