The first mosque in Ghana is known as the "Mecca of West Africa."

At Ghana's largest wildlife refuge you feel like you're right in the animals' backyard.

Where thousands of slaves passed through the "Door of No Return."

This fortress sits atop a centuries-old well system.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

The modern birthplace of Irish freedom.

A remarkably intact castle that once was the largest in Ireland.

One of Ireland's most infamous prisons for rebels including men, women and children.

The ancient tomb acts as a calendar that keeps perfect time.

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.

The other side is actually green.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Crumbling necropolis set high above Fez.

These azure waters were thought to lead to the Mayan Underworld.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

A sprawling nature preserve harbors the world's only living dragons.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

Everything from a plane to your own two feet are needed to reach this jungle resort.

Sacred Buddhist home of some spiritual monkeys.

Named after the Goddess of Harvests, Annapurna is the deadliest member of the Eight-thousanders club.

A Himalayan monastery claims to have a piece of a centuries-old abominable snowman.