A shrine of fire worship built on top of a natural flame.

Mysterious hillside with a continuously burning natural fire.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

The world's second-tallest flagpole stands proud despite dropping rank.

This ancient Silk Road outpost overlooking the Wakhan Valley is miraculously still standing.

A building facade covered with the statues of 11 giants of Tajik literature.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

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 Soviet statue is based on a piece of propaganda that's been elevated to national myth.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

An entertainment center in a huge transparent tent.

Iconic pyramid from famed British architect Norman Foster designed to represent all of the world's religious faiths.

It took 28 years to build this massive statue of the Hindu god Vishnu riding a mythical bird.

Subterranean place of worship in Indonesia.

Where cemeteries are carved into the side of cliffs and infants are buried in the hollows of trees.

Hundreds of Buddhas in a re-discovered Indonesian temple.

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."