This elevator was built in 1907 to connect two neighborhoods separated by a steep, rocky cliff.

An underground network of massive stone arches and their skylit vaults support ruins of portico structures above.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A marvel of Byzantine engineering under the streets of Istanbul.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

A meow-velous tribute to a beloved street cat, made famous on the internet.

The ornate miniature mansions were built for Istanbul's feathered residents.

Four distinctly unique gardens commemorate the POWs who lost their lives during the Sandakan Death Marches of 1945.

These rat eating Giant Malaysian Pitcher Plants may have evolved to eat shrew poop.

The oldest museum in Borneo is a cornucopia of rare taxidermy and human skulls.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

1800 rooms of single-family residence in Brunei.

Ferdinand Magellan dubbed the world's largest water village the "Venice of the East."

A remote lodge nestled among some of the world's best-preserved rainforests.

Khmer Rouge's high security prison.

More than 100 Hindu temples are slowly being swallowed by the forest.

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

A quick and simple solution to Cambodia's train woes.