A perfectly circular lake is formed by the crater of an ancient underwater volcano.

This abandoned five-star hotel is now a five-star urban exploration destination.

Pilgrimage site for star-crossed lovers.

The Guardian of Tallinn.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

China's most famous acrobatics act.

The once highest point in China blends symbolic design with a kick of adrenaline.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

The past, present, and future of Russia's signature alcohol is remembered in the world's only museum dedicated to the starchy spirit.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Why walk on this historical site when you can zoom down instead?

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

America's oldest archaeological site or a muddled case of wishful thinking.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

One of the few brewers in the U.S. experimenting with hop-free beers.

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Annual celebration commemorating the 1965 sighting of strange lights in the town.