The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This bar and museum are devoted to the controversial comic book work of Kája Saudek.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

A crumbling hospital from the 1850s on Roosevelt Island.

World's largest collection of serial killer artwork and other macabre exhibits.

This recipe is set in stone.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

An enormous overgrown greenhouse teeming with graffiti and wildlife.