Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Iceland's largest lagoon is home to stunning multi-colored icebergs.

A black sand beach where glacial fragments wash ashore and look like sparkling diamonds.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Atop this library is one of the most beautiful green spaces in Warsaw.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

This natural rock formation has an anatomical aesthetic.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

Marvel of green building techniques that sings with the wind.

A dinosaur-laden walking trail outside Singapore's Changi Airport.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The giant birds honor two native North American species.

The 10,000 Torii shrine.

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

A quirky hardware store filled with museum-worthy cars and motorcycles, including a motorcycle that set a land speed record in 1967.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

A futuristic rocket marks the spot where three borders meet.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

This iconic high-rise residential block was one of the last to be built in the Brutalist style.