This massive library holds what was once the largest book collection in the world.

France's most famous cemetery, with some of its most curious tombs.

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

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

This South Pacific volcano has been blowing its stack for over 800 years and is said to be home to a cult leader waiting to be reborn.

The best place to encounter plants and animals that can only be found in New Caledonia.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

The last standing example of an ancient district's teatime tradition.

A mountain path passes by several sprawling enclosures home to a pair of rescued brown bears.

Head to the mountains to catch a glimpse of Spain's endangered subspecies of brown bear.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

A secluded natural oasis hidden deep along a rainforest trail.

This underwater cave in Madagascar is home to what is thought to be the country's largest fossil graveyard.

In this African village, the walls of the chief's compound are painted with beautiful traditional designs.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

This amazing oasis of art and plants is hidden on the outskirts of Marrakesh.

An ancient burial ground believed to have been used for ritual sacrifice.

The other side is actually green.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.