A mad mystery man who led Canadian mounties on a 150-mile wilderness chase is still buried with his secrets intact.

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

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

This museum was invented in a novel before being made real by the author.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

A fountain standing as a testament to a doomed alliance.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

This ancient stone necropolis is in danger of disappearing.

A tropical paradise once home to space exploration and military installations.

One native village in Bali lays their dead at the foot of a holy tree whose natural fragrance seems to hide the stench as the bodies decompose.

The once great capital of Egypt now crumbles forward as evocative ruins.

A 200-year-old prison that now houses a peculiar crime museum.

Luxurious devotion and 500,000 images of Buddha in Myanmar.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

Wondrous stalactites house thousands of bats in these African caves.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

A scalable map of Colombia with the bonus of a butterfly house.

The palace of the King of Kings, burned by Alexander the Great.

A decommissioned submarine base makes a great space for graffiti art.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

A magical world of elves and fairies tucked amongst the trees in Colombia.