An abandoned socialist utopia built in the late 19th century.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

This hulking behemoth is actually five interconnected towers built in the 1960s.

The coldest city in the world.

Henry Ford's failed rubber plantation in the middle of the Amazon rain forest.

The villagers of the coldest inhabited place on Earth adjust to unique challenges presented by day-to-day living.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

A fantastical group of cliffside stairways, bridges, and twisting paths carved out of stone provide a surreal coastal hike.

Rock-cut chamber at top of an outcroup, reached by a mountain stairway of forty steps.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

A Hawaiian stairway to heaven—that you can't climb.

Hidden just under the waters around this Turkish island are the ruins of a once great city.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

Flamboyant architecture from the turn of 20th century.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

"There's nothing there," and other lies the KGB told us.

3,000 market stands in five former Zeppelin hangars.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

This Funeral Hearse Museum represents the finest in cadaver transportation.

Week-long block party becomes a competition for the best decorated street.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

From mining complex to industrial exhibition, this museum once played a major part in the X-Files.