Originally a meeting place for foreign correspondents and war reporters, the FCC remains an atmospheric spot for sunset drinks in Phnom Penh.

Khmer Rouge's high security prison.

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

One of the biggest markets in Asia, under one of the continent's largest domes.

A gruesome memorial for those lost in this area during the Khmer Rouge genocide.

This impressive clifftop temple was once at the center of an international custody dispute.

More than 100 Hindu temples are slowly being swallowed by the forest.

5,000 skulls in memorial to those killed by the Khmer Rouge.

A battle between nature and architecture in the Cambodian jungle.

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

This elaborate towering structure was once famed for its revolutionary height.

There aren't too many operational funiculars around, but Pittsburgh has two!

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A multi-storied adobe complex has been inhabited for more than a thousand years.

This massive redwood tree has a hole in the base big enough to drive through.

Magical-looking cottages that inspired one of the most famous animated films ever.

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.