The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

You can row a boat through this ancient underground reservoir.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Climb atop one of the world's longest and heaviest trains for an unbelievable journey across the Sahara Desert.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A monument to the military service of America's greatest traitor refuses to even name him.

A mysterious echo seems to defy the laws of acoustics.

Teddy Roosevelt’s famous “midnight ride to the presidency" started at this small lake high up in the Adirondacks.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Secluded amid upstate New York’s Adirondack Mountains lies this subterranean emblem of a nation on the brink of nuclear war. And it's for sale.

A massive Montreal stadium that has seen nothing but trouble since its inception.

An exquisite tunnel of cascading flowers.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

The highest tides in the world come in and out here twice a day, allowing you to essentially walk along the ocean floor.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Part of a secret 1970s nuclear defense program is now open to the public.

This abandoned subway station can still be seen on regular commuter trips.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The "Seinfeld" diner.