You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

It is believed that the historic tower is sinking at a rate of an inch a year, though no one is completely sure why.

A unique beach made of a myriad of multi-sized pebbles.

The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

A patch of Philippines forest devoted to saving the lives of an emotionally sensitive species of googly-eyed primates.

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

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

A magically clear, blue river that seems to spring from nowhere.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

This extremely remote border crossing was closed to prevent smuggling and looting.

Mongolian Buddhists believe this monastery in the Gobi desert to be the center of the world's spiritual energy.

The oldest Buddhist monastery in Mongolia has survived centuries of invasions, political shifts, and religious purges.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

The grassy landscape is home to the world's last truly wild horses.

Enormous statue of the Emperor of the Mongols.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

The 400-year-old remains of the samurai invasion of Korea.

Seoul amusement park boasts a Korean-speaking pachyderm.

Ancient temple is home to centuries of art and spiritual artifacts.

Home to more than 13,000 pieces of war memorabilia and military equipment.

120 mortarless pagodas built by one Korean hermit.

A Korean village where times stands still.