Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

The Uyghur settlement in the middle of a lake continues to raise questions.

Volcanic irregularity? Odd erosion? Alien eggs? Local legends compete to explain these strange orbs.

An abandoned 14th-century castle and prison complex on a small island in the Neva River.

Russian researchers who have been excavating ancient squirrel burrows may have brought a 32,000-year-old plant back to life.

What was once the base for Russia's first nature reserve is now a ghost town, right on the shore of Lake Baikal.

The giant Siberian crater known locally as the "doorway to the underworld" is expanding every year.

An unusual collection of self-made musical instruments and unique noises.

Five mile wide circular ring of rock in the Russian Far East is a curious geological oddity.

An abandoned town of skeletal wooden homes.

Gigantic natural towers in a Russian plateau.

No one knows why ancient labyrinths were built on this tiny northern island.

Unusual, mushroom-like rock formations caused by weathering and water erosion, set to disappear, according to geologists.

A small part of Russia that does not touch any other part of Russia.

Abandoned castle was once a grand example of Russian privilege, built exclusively to win a frivolous bet between noblemen.

Site of the largest impact event to occur over land in Earth's recorded history.

Nightmarish example of the unintended consequences of weapons testing.

A little church on a tiny island looks like something from a fairy tale.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

Museum celebrating the achievements of the Soviet space program.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

The true depths of these stunning Moroccan caves are unknown.