Two monstrous faces loom over a village in Czechia.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Mysterious lost empire of the Silk Road.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

The palace of the King of Kings, burned by Alexander the Great.

Massive stele returned to Ethiopia after 70 years in Rome.

An ancient necropolis of magnificent tombs.

Breathtaking Byzantine paintings cover the inside of this 12th-century church.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Charnel house at the foot of Mount Sinai.

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

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.