Stockholm's deepest subway station is also a stunning ecological wonder.

It houses the remains of a 17th-century version of the Titanic.

A golden egg-shaped sauna in the Arctic tundra.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This full-sized orange tree lives suspended in mid-air above the streets of Jaffa.

This junkyard made over as a theme park is the "Most Alaskan place in Alaska."

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Apartment complexes built into huge repurposed natural gas tanks.

A silly medieval mural preserved on the side of a Viennese house.

The Habsburgs' royal collections of art and wonders.

This museum promotes informed contraception by documenting its often secret past.

Op-art architecture designed for happiness.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The beautiful baroque library of the Hapsburg empire.

One of the biggest markets in Asia, under one of the continent's largest domes.

This odd museum/art gallery embraces the physiological, zoological, and ethnographic side of sex.

The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.