An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The mark of the Devil's horns on a marble column in Milan.

See what remains of a once grand ancient Roman circus.

This poignant art installation raises awareness of violence against women.

A perfect turquoise lake colored with glacier dust.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

WWII artifacts, including the building itself.

The oldest of the three remaining bridges in England with buildings on top of them.

The world's first military tank was designed in this English city amid the stalemate of WWI trench warfare.

This mesmerizing architectural wonder will take your breath away with its unusual color patterns.

A neglected bell tower in modern Colombo is a symbol of the city's colonial past.

Pettah's beautiful floating market was once a stinky canal in a sketchy industrial area.

This Sri Lankan cemetery is the final resting place of sci-fi legend Sir Arthur C. Clarke.

This Colombo wetland is an unlikely wildlife haven just outside the capital city.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

This elaborate temple was built around one of the Buddha's teeth.

A Sri Lankan tea factory's ironic take on the Los Angeles landmark.

Known as the most scenic route in Sri Lanka, this train line is steeped in history and offers an unparalleled view of the country.

This ancient cave temple complex is the largest and best-preserved temple complex in Sri Lanka.

An ancient stone fortress considered by many to be the eighth wonder of the world.

An ancient temple to the Hindu god Shiva surrounded by jaw-dropping scenery.

One of the few places where inexperienced snorkelers can spot a shark.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.