These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

A human attendant once directed car traffic from this structure before automated stoplights.

The world's largest indoor go-kart racetrack is hiding in Connecticut.

It was founded by Ralph Nader to educate the public about an often-maligned area of law.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

The remains of this misplaced church were moved here stone by stone.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This postmodern apartment block was designed to be a vertical neighborhood.

Scars of this building's past life as a violent prison still cover its walls.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A sharp sculpture made of thousands of pieces of jagged glass.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An enormous pair of straw sandals woven in the traditional way—to keep demons at bay.

Weighing nearly 7 tons, this massive sculpture was carved out of 500-year-old wood and decorated with thousands of jewels.

A flight of this "ghost staircase" has 40 steps on the way up, but only 39 steps on the way down.

This Japanese Manneken Pis gets new outfits for every occasion.

For hundreds of years, participants in this Japanese festival have been making babies cry to ward off demons.

A King Kong-like gorilla hangs from the top of this commercial building in Tokyo.

An unexpected curiosity cabinet hidden within a department store in the Japan Post tower.

Starship-temple contains 400 tons of drinking water and offers free Japanese lessons.