This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The ruins of an ancient Celtiberian town with incredible rock-cut buildings and a Roman aqueduct.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

This pub can leave even the sober feeling slightly unsteady.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

This famed Silk Road oasis was one of the largest cities in the world before it was destroyed by a Mongol horde.

This dragon-shaped sports arena is the world’s largest solar-powered stadium.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

There's a lot of horsing around on this lonely stretch of Australian highway.

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

Dedicated to the first German Chancellor, Otto von Bismarck, this aging edifice is the only one of its kind in the Americas.

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

World's strongest whirlpool.

This peculiar Italian elevator runs both horizontally and vertically.

The remains of a remote village that once housed over 1,200 dam workers and their families.

This quaint funicular has been ferrying people up and down an English valley since the Victorian era.

An enigmatic sculpture depicts a ruined home with debris stretching for over half a mile along the river.

Six rock shelters covered in abstract art created by ancient Ugandan tribes.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

These planks were originally installed to hold the dead.

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

The much-loved protagonist of famed Argentinian comics can be found sitting on a park bench.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

A spring-fed pool so deep it's used for scuba diving as well as swimming.