A limestone wonderland of water and subterranean secrets.

Stunning wetlands ablaze with pink lotus flowers.

This former brickworks pit is full of legends about its murky depths.

Australia's oldest artists' colony.

These 400 million-year-old caves feature honeycomb limestone formations.

Designed to provide fantastic views of the surrounding rainforest.

The evolution of a simple creek cutting its way through an ochre mountain side.

These abandoned ruins in the middle of Jaffna have withstood centuries of tumultuous power struggles.

This luscious masterpiece created by landscape designer Bevis Bawa inspired the work of his brother, a famous Sri Lankan architect.

The ruins of an early-18th-century complex that could once house up to 12,000 horses.

Reaching this rock formation involves a hike through rocky rapids and springs where wild turtles reproduce.

Hidden behind mountains in Morocco, a remote town hides a thriving surfing community.

The forgotten remnants of a land-to-sea cable car that was once unique in the world.

One of the tallest waterfalls in Africa is also home to a population of monkeys who enjoy the waters and the occasional guest.

An eerie former warehouse turned cistern turned movie set.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

This former royal palace with gorgeous gardens became the first museum in Morocco.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

Rocky Atlantic beach home to a stunning stone arch.

This block in downtown Brooklyn was a hotbed of antislavery activism along the Underground Railroad.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.