Electrical curiosity museum housed in an old transformer station.

Over a million items cram the shelves at Africa's largest shop of used and rare books.

Abandoned Japanese ghost town gives a glimpse into what our own metropolises may leave behind.

Large Hadron Collider and the Birthplace of World Wide Web.

If astronomy had a ghost, it would look like this observatory.

A naturally beautiful, seemingly bottomless deep blue spring.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This one-time health resort was used by aristocrats around the world.

The world's largest drain sits below the city of Kasukabe, Japan.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

An underground city of salt.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

An abandoned saucer-shaped monument in the Bulgarian mountains.

The most alien-looking place on Earth.

The remains of diamond fever taken over by the desert.

Dig for your own trilobites in this goldmine of invertebrates.