This abandoned radar site is slowly being taken back by the jungle, its mission cut short by the end of the Cold War.

What was once supposed to be the symbol of a shining Afghan future is now a bombed-out ruin.

These passages carved from the Antarctic ice hold strange shrines to the harsh southernmost climes.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

A battle between nature and architecture in the Cambodian jungle.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

The largest land animal skull ever discovered.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

Miraculous tree that seems to sprout out of solid rock.

One of the smallest towns in the United States.

The same security that protects our nukes accidentally protected a gentle herd of antelope.

Home of the International Space Hall of Fame.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The Uros people live on floating reed islands in lake Titicaca.

A glacier pocked with ice caves and surrounded by rainforests.

The glacier tucked within a New Zealand rainforest.

Come for the flowers, stay for the bats!

Singapore's landscaping project is home to 18 incredible Supertrees.