This network of tunnels housed an entire village for years, and even had a hall for screening movies.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

A Himalayan monastery claims to have a piece of a centuries-old abominable snowman.

Made by a man on a worldwide sanitation crusade.

Dedicated to the unsung history of human waste.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

A Jenga-style cylindrical tower of books that appears to go on forever.

An ingenious Dutch land art project uses grass ridges to cut airport noise pollution in half.

These beautiful objects represent beautiful ideas.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

This doorless 20th-century elevator doesn't stop or slow down.

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

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Sleep in a climate-controlled plastic bubble for the night.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

The body of an unidentified woman, visible through a glass coffin, was discovered by accident.

The mysterious headstone of an unidentified bank robber was seen visited, every year, by a woman in black.