The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

A maze of underground tunnels beneath one of the most beautiful forts in Serbia.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

This picturesque island graveyard is the final resting place of dozens of notorious pirates.

This is what trains will look like after the zombie apocalypse.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

Natural time capsule containing an alien ecosystem.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.

A sophisticated astronomical tower built by one of the greatest Persian scholars of the Islamic Golden Age.

An ancient iron pillar in Delhi that seems to be rustproof.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

This small group of sand dunes manages to pack in a strange rainbow of colors.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.

Someone left a Boeing 737 in a field in southern Bali.

Wooden sleds have replaced donkeys to cart goods around this utterly charming car-free village.

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

An architect transformed this abandoned cement factory into his castle-like workshop.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This abandoned oil depot produces world's longest echo in a manmade structure.

The site of the first battle of World War II.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.