Where the embers of the Big Bang were first detected.

Haven for steampunks.

The world's smallest drawbridge.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

This Cold War–era underground city includes offices for Mao Zedong and Lin Biao.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

Built in just a little over a week this preserved bunker was created to protect our most attractive POTUS while he was on vacation.

When methane gas started seeping up from the ground, they picked up and moved the entire town.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Not your typical pet cemetery.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

A warm desert spring holds one of the rarest species on earth.

A mile-long navigable cave adorned with stalactites and stalagmites reaching up to 65 feet tall.

The island that holds the world-record for largest human massacre caused by animals.

The "original web site," this farm in Northern Vermont encourages orb-weaver spiders to build their daily webs, and then sells the preserved masterpieces.

A unusual sanctuary for abused and exotic animals in South Jersey.

The mysterious white squirrels of this Illinois city are treated like sacred cows.

Where pardoned turkeys once spent their all-too-brief final days.

An unphotographable nightly march of tens of thousands of "fairy penguins" from sea to shore.

A conservation sanctuary for rescued koalas, some of which were saved from devastating Australian bushfires.

An exhibit of endangered species confiscated from smugglers and passengers.

With only one flight in and out a week, the unfenced runway at this small island's airport transforms into a seaside park for locals and visitors.

In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.