Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.

This everlasting lightning storm may be the world's largest generator of ozone.

This isolated island is often capped by its own fluffy cloud.

This remote island, home to the easternmost point in Denmark, once hosted pirates and a military fortress.

For more than 40 years this Barnum-inspired half-fox, half-woman has been telling fortunes from her cage in a Pakistani zoo.

This haunting ghost ship stands beached in the waters off the coast of the Falkland Islands.

This historic steamboat is scuttled just a few hundred feet from where it was built over a hundred years ago.

A carnivorous plant paradise in a serpentine bog.

Nuclear waste dump site now an environmental sanctuary.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The only visible piece of San Francisco's most famous shipwreck.

Guns that have been defending San Francisco since 1904.

A 300-ship graveyard, with a few still visible at low tide.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

All that remains of the fishing-vessel-turned-warship is its weathered hull.

60 feet of towering steel balances gracefully.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

Though nicknamed the “Russian Freighter,” this ship was actually sunk off the coast of Pensacola by the U.S. government in a top-secret operation.

This crescent-shaped sliver of sand is a magical haven for a herd of feral horses.

Divers can encounter an abandoned warship encircled by a giant kraken submerged in the British Virgin Islands.

Road signs in Namibia mark the location of one of the five major circles of latitude.

The tomb of a pre-Hispanic governor, inside the vestiges of a Mesoamerican city.

This black cat was actually designed to ward off bad luck.

A hand-built folk art installation covered with messages of God's love.