Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

This steaming, yellow-tinged landscape is filled with sulfur-encrusted volcanic vents.

Hues of distinctive blue to bluish-green color the slopes of these hills.

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

Nestled in the woods lies this land art project: a hybrid between park, maze and natural monument.

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

The world's only museum devoted to the wonders of fluorescence.

White llama terraces dazzle in Peru's "other Machu Picchu."

These massive moving sand dunes have swallowed an entire village and are still on the run.

Naturally formed rock city in Poland.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

An underground city of salt.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

This well held a sacred source of water supposedly unleashed from the barren rocks by a wizard-like archbishop.

The outside of this exposed Moche pyramid is covered with striking colorful adobe friezes.

An abandoned Incan construction project left behind a mysterious "doorway."

After an epic flood washed away its enslavers, this city has been part ghost town, part cultural wildcard for the past three centuries.

These delicate ruins need more tourists to keep them from fading away.

A pretty park of over 1,600 olive trees that grew from just three saplings brought over from Spain.

The highest tropical mountain range in the world is in Central Peru, home to a vast array of exotic and quirky plants and animals.

A mysterious pre-Incan ruin believed to have miraculous healing powers.

This stone complex marks the urban center of a lost civilization.

The world's largest clay lick, where parrots gather to snack.