One of the largest necropolises in the world is home to a stunning array of historic Middle Eastern tombs.

The world's second largest salt mine, said to have been discovered by Alexander the Great's horse.

Reputedly haunted sandstone necropolis with exquisite stone carvings.

This dazzlingly turquoise mountain lake was created in the wake of a natural disaster.

This lost city belongs to one of the earliest civilizations in the world.

Dedicated to a Bolshevik revolutionary, this museum is a true time capsule of the Soviet era.

According to myth, there's a bloody explanation for the beautiful bright red color of this rock formation set amidst alpine vegetation.

These oldest of these "embroidered stones" were carved 4,000 years ago in a high mountain valley.

This village was once a thriving Soviet uranium mining center, but is now semi-abandoned and desolate.

This mysterious complex of abandoned yurts and fading murals was meant to be a center of science and spirituality in Kyrgyzstan.

Built entirely of interlocking pieces, construction of this Chinese Muslim house of worship required zero nails.

Lonely minaret stump of a destroyed city.

A stunning blue-green lake located in the Terskey Alatau mountain range.

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

Glacial lake that mysteriously empties itself every year.

A boulder carved into the shape of the cosmonaut's head.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

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

Extremely isolated Silk Road caravanserai in the middle of nowhere.

One of the largest mud-brick structures in the world.

A nearly abandoned Jewish settlement perched atop a hill in the heart of Yemen.

One of Yemen’s oldest and most beautiful mosques was named for the incredible, historical queen buried inside it.

A mesmerizing reservoir nestled at the heart of a pre-Islamic Yemeni village.

Elaborate patterns adorn the city's disappearing traditional architecture.