Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

A slice of central Asia in the middle of Berlin.

Oriental bazaar in the heart of Sarajevo.

The place where World War I began.

This abandoned-looking amusement park is frighteningly open for business.

North Korea's massive "hotel of doom."

Light still pours into the ruins of this ancient Islamic observatory.

Ancient barriers wrap around what was once an important stop along the Silk Road.

The Avenue of Mausolea is a series of grand palatial tombs.

This cavernous swimming spot doubles as a home to the largest known colony of bats in Central Asia.

This famed Silk Road oasis was one of the largest cities in the world before it was destroyed by a Mongol horde.

A fiery crater has been burning in the Karakum Desert since 1971.

The past, present, and future of Russia's signature alcohol is remembered in the world's only museum dedicated to the starchy spirit.

Dark, eerie exhibits make for a surreal exploration of the subconscious.

The home of half the world's population of critically endangered mountain gorillas.

An ancient jungle temple carved into a rocky overhang of the Dane Soung Plateau.

Thousands of effigies of Buddha watch from caves set high above a legendary river, plus whiskey.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

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

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

The largest stone moai on Rapa Nui.