This remarkably intact, 260-year-old cargo ship is only visible at the lowest of spring tides.

In a time before lifeguards, this house was a sanctuary for the shipwrecked.

A mysterious, weather-beaten bus lies on the coast of Harris, enticing the curious to investigate.

The stunning remnants of this wreck emerge from an otherworldly backdrop of rainforests.

The rusty hull of this 1899 ship serves as a tribute to explorers of the bottom of the world.

One of the most popular attractions in the small resort town of Kabardinka.

The remains of the wrecked steam trawler can be found on the beach at low tide.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This monument commemorates the soldiers who fought for 16 hours straight to penetrate this concrete fort.

A small part of Russia that does not touch any other part of Russia.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

This secret Swiss fortress is disguised as a harmless pink house, complete with fake windows.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The sullen remains of vessels abandoned in the Port Adelaide River.

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

One of the largest ancient geoglyphs in the world is a tall desert god used for predicting the weather.

This hotel is located on the edge of the world's largest salt flat and is made out of the only material around.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

A seemingly endless landscape of pure salt stretches far across Bolivia.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.