Hidden deep within a Filipino jungle is an incredible waterfall that plunges into a dazzling blue-green pool.

This curious fresh and salt water lake holds a secret that draws in deep divers from around the world.

This burial cave houses around 100 ancient coffins, neatly stacked to form a massive wall.

These tiered rice paddies were carved into the hillsides 2,000 years ago.

This massive Roman Catholic rosary is composed entirely of wood.

Just off the road outside Baguio, a gigantic lion's head carved into a mountain greets those driving by.

Sometimes known as the little Niagara Falls of the Philippines.

A Swiss magician's vault of oddities.

Everything from alchemy books to building plans for the Eiffel Tower are housed inside this museum.

The largest underground lake in Europe.

This large sculpture of white plates and forms is actually a huge sound amplifier.

Though it may look like a businessman's lost luggage, this case suspended under a highway bridge is actually a contemporary art installation.

A permanent exhibition honors Queen, which recorded seven albums at the casino-based studio, including “Under Pressure” with David Bowie.

Part of this hotel resides in Switzerland, the other in France, and the border splits the honeymoon suite.

This ossuary is more than five centuries old and is heralded as one of the finest in Switzerland.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

This macabre painting of a Shakespearean scene looks like something out of a nightmare.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

Britain’s longest ancient monument, this great 8th century earthwork was built to mark the boundary between what would become England and Wales.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

The last resting place of the famous Native American princess is marked by a haunting monument.

This stream-carved gorge has inspired poets, hidden smugglers, and trained soldiers, all without losing its beauty.