One of the largest caves in the world open to the public.

This massive subterranean fissure is known as the "underground Grand Canyon."

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

Small-town museum dedicated to outer space ... and bicycles.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

This professional clown's home is an outsider art wonderland.

This massive roadside mascot was the first version of the giant to illustrate his butt.

A small Montana town commemorates the dog who waited at the train station every day for his owner to return.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

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

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

Orcas on display and in the water.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.

A cave interior in the shape of the ancient rhinoceros, created by lava cooling around its carcass.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

The tale of a strong-willed woman who stood her ground when the commercial world came rumbling in.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.