This research center for rare prosimians is studying how they sleep to help prolong human life.

A Natural History and Science Emporium.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

World-famous, Pink's still manages to keep its prized cult fetish status.

Copenhagen's celebrated theme park and gardens.

The celebrated eyesore created by starry-eyed sweethearts.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

An essential stop before plundering, BYO Cutlass.

San Francisco's newly reopened hands-on science museum.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

2300-year-old Roman road connecting the empire.

A flooded Mexican cave that hides a river beneath the water.

It houses the remains of a 17th-century version of the Titanic.

One man's swirling six-acre monument of stone.

Oldest existing wire suspension bridge in the United States.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.