The tallest hotel in Europe.

World's largest bell sits on the grounds of the Kremlin in Moscow.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

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

Museum design and public transportation meet in this unique Russian train car.

Dozens of padlock-trees along the Moscow River.

Former headquarters of the KGB.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

A quirky and charming restaurant founded by artists.

Rebuilt remains of a temple to Roman god Mithras.

Mysterious craters may have been home to an ancient cult.

Resonant stone, that has been played since prehistoric times.

Ozymandias’ time-keeping temple.

Giant marble phalluses on the sacred island of antiquity.

A pagan tradition of draping trees with rags eerily lives on.

A Neolithic burial site built 1,000 years before Stonehenge.

A passage grave used in neolithic rituals.

Back in the day everyone who was anyone played this historic western theater.

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

A medieval fresco which reminds visitors that death will come for us all.

This small stone chapel is a hidden gem just outside the University of New Hampshire campus.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

These ancient sacred grounds granted amnesty to those who managed to reach them.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.