Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A building so large that it has its own weather.

The magic's in the hole!

Concrete strongholds stand guard over the Golden Gate.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Abandoned silver mine strewn with wrecked and twisted structures.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

Mexico's astounding mummy museum with "the world's smallest mummy."

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Mysterious glowing orbs float through the desert night.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Elevated freight railway turned wildly successful urban park.

A haunted hill that supposedly defied gravity.

Curios, scientific antiques, oddities for sale.

The largest island on the great salt lake is home to curious creatures and strange stories.

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

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.