An abandoned NSA listening post on Berlin's "Devil's Mountain."

Started as a kitchen garden, now the second largest botanical garden in the world.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

What is the Thing?

Home of the International Space Hall of Fame.

A museum dedicated to the alleged Roswell Incident.

The world's largest Holstein cow.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Ever wanted to can Spam?

The magic's in the hole!

A layered tribute to the work of mosaicist Isaiah Zagar.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Stairs often replace streets on the steep slopes of this old mining town.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

See massive fossils that are over 200 million years old in northeastern Arizona.

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Explore the complex ecology of this multifaceted nature preserve by riverboat.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.