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

A former smithy turned cultural hub with the capital's largest mural space.

This sublime architectural marvel is a rare example of an expressionist church.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

The first skyscraper to include a Ferris wheel built into the facade.

The decaying remains of a once-luxurious Soviet spa town.

Small church on top of a huge rock column.

Traditional Danish spot where the schnapps are flowing and the smørrebrød is loaded.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

A quirky collection flush with information on commode culture from ancient times to modern day.

A Kyiv-based repository for all manners of discarded curiosities.

A memorial to the murdered Jews of Kaunas.

Kyiv's answer to Muscle Beach is a Soviet-era gym made from scrap metal.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

Rare documents, old instruments, and gruesome specimens showcase the history of military medicine.

World's largest permanent maze made of 18,000 conifers.

This strange building looks like a medieval fortress crashed into a 1960s Brutalist office block.

Someone left a Boeing 737 in a field in southern Bali.

The site of a mysterious pony massacre is rich with extraterrestrial conspiracy theories.

This historic Benedictine monastery brews a booze so toxic that it has often been blamed almost singularly for Scottish hooliganism.

This tangled English forest looks like something right out of a fairytale.

A ruined castle has more than its fair share of legends and ghost stories.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.