Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

Shrapnel, dynamite, bullets and Franco couldn't destroy this bust, rescued and kept hidden as a family secret for over 40 years.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

The clever workshop that has been designing some of the most unusual coffins imaginable.

One of the few surviving street funiculars in the world.

The sunken structure looks like the victim of a catastrophic flood.

The largest cactus farm in Africa.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A collection of retro plastic goods made with "the material of a thousand uses."

A tower-like theater in the Swiss Alps built to withstand the high winds and avalanches of the mountain pass.

Europe’s oldest natural human mummy.

Typewriter museum housing more than 1,500 machines preserves the history of the grandfather of computers.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

Wooden sleds have replaced donkeys to cart goods around this utterly charming car-free village.

Beasts and branches swirl in sandstone carvings, interrupted by one strange creature.

The world's smallest movie theater runs on solar power—an attraction in itself.

Go deep down into the earth to experience the world of Welsh coal miners.

Waste incinerator with a restaurant on its chimney.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

A bright and wacky exhibit answers every question you may have had about human excrement, flatulence, and more.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

A national collection of Communist-era musical posters.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

Go surfing on this urban wave, "hacked" by local surfers.