The "Crow Boat" of Kootenay Lake, sold for a dollar and now on display as "the world's oldest intact passenger sternwheeler."

The rusting hulk of a hand-powered, nearly 160-year-old submarine abandoned in 1869 due to the ravages of decompression sickness.

Cockatoo Island is a Heritage-listed island in the middle of Sydney Harbour.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

These fantastically named natural pools look like something out of a Scottish myth.

Five miles of underground river link lake to ocean.

The petroleum industry brings you the joys of hydrocarbons and largest collection of antique oil rigs in the world.

Tour the original street level of Port Angeles, buried underground in 1914.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

A new kind of theme park for adults off the Las Vegas Strip.

A preserved 18th century steel factory.

The secret city built by the Manhattan Project.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Abandoned ship reimagined as a street art canvas.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

Rusting ships sit in a desert where a sea used to be.

World's oldest and largest space launch facility, once a secret missile testing site.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

The rusted remains of a victim of Hurricane Ike.

An extraordinary mixture of natural beauty and man-made phenomena.

A serpentine highway twists and turns over the treacherous Norwegian Sea.