The first American department store, and home to the largest operating musical instrument in the world.

A fiery crater has been burning in the Karakum Desert since 1971.

This ancient walled garden turns fog into food.

The walls and streets of the ancient city are peppered with penises.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

Bioluminescence in the reefs of the Maldives causes the sea to glow like a starry night sky.

A dark, narrow tunnel that leads to a charming lake and waterfall.

One of the most acclaimed eateries in Arkansas is a two-table diner on the ground floor of a family home.

This freshwater spring fills with 10,000 gallons of water per minute.

Spectacular views await visitors to this lake.

A quiet rock and botanical garden is the beautiful centerpiece of Fort Lewis College.

The precise origins of this pink sandstone temple are unknown.

A surprisingly beautiful abandoned World War II military base in East Greenland.

This former Cyprus flight hub is now a crumbling, abandoned ghost complex.

Mysterious rocks that ring musically when struck.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

With a crest near 10,000 feet, this treeless fault-block mountain in eastern Oregon provides stunning views and spectacular glacial landforms.

In the foothills of the lesser Caucasus, a centuries-old fortress still stands.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

This site in Caldwell County is the location where the Cherokee and Catawba are said to have entered a peace treaty.

A frozen oasis lies beneath the scorching New Mexico desert.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.