A giant interactive periodic table with real samples of the elements.

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

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

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

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

The first museum in the world devoted to sexual gadgetry.

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.

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

A school teacher's massive and terrifying self-built castle.

This vast, pristine wilderness is home to a rare subspecies of black bear.

An abandoned logging settlement nestled in the woods near a popular ski town.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

This former prison now houses a lovely library devoted to Quebec's oft-maligned English-speaking history.

Three buildings constructed of over 25,000 multicolored glass bottles.

Underground tunnels once home to crime are now back open to the public.

A community-run museum invites visitors to explore Jewish communities before and after the Holocaust.

This rocky spread has been squeezed up directly from the bowels of the earth.

The Arctic Archipelago is home to world's largest third order island: an island in a lake on an island in a lake on an island.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

Unlike many reclaimed, abandoned mines, this Canadian cave system is still just a dangerous maze.