Hidden behind a Target are pillows of cooled lava that formed at the bottom of a deep lake in the Mesozoic Era.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

The only diamond mine in the world where you can keep what you find.

A reproduction of earth's many biomes.

Most-visited and most-photographed slot canyon in the American Southwest.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

An abandoned aircraft sits submerged in a lake in the Alaska wilderness.

One woman's dream became a train hotel in her backyard.

Four-story concrete hotel never opened to customers.

A trading post in the North Pole where children send letters.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

Gorgeous cave resemble a winter wonderland.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Come for the boats, stay to explore the intriguing assortment of art.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

A wealth of local folk art, antiques, and curios, without ever leaving your car.

One person's lost luggage is another person's treasure.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.