This ancient Spanish castle sits high upon a hilltop.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Famously misunderstood wonder of the ancient world

A Romanesque tower appears when water levels drop.

A naturally mummified 2,000-year-old man.

An ancient capital city that dates back 3,000 years and harbors many surprises.

Hoax, mistake, or evidence of dinosaurs in human times?

A battle between nature and architecture in the Cambodian jungle.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Ancient Egyptian relief, claimed to depict an electrical light.

These Nubian pyramids are strange and unique, even by pyramid standards.

The largest known Ancient Egyptian obelisk.

Ozymandias’ time-keeping temple.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

Protecting the dead from opportunistic body snatchers.

Charnel house at the foot of Mount Sinai.

In Egypt's expanding metro area, many of the neighbors are dead.

The final resting place for the remains of 143 Habsburg royalty.

Sacred Buddhist home of some spiritual monkeys.

The tallest hotel in Europe.

Former headquarters of the KGB.

Stalinist skyscraper built with help of cryotechnology.

Gargantuan home of Russian science.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.