Naturally protected city carved from a rock face.

Pompeii's less famous neighbor is still revealing her secrets.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

This legendary city has been a tourist attraction for centuries.

Huge stone depressions which may have acted as an Incan agricultural experiment.

An ancient neolithic tomb that only sees the sun twice a year.

The Emperor Tiberius' palace of debauchery.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

A mere stone's throw from Islamabad exists a spectacular display of three millennia of humanity's progress.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

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

One of the largest Roman settlements in Portugal.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

A centuries-old fortress city lies in ruin.

Remains of an abandoned coral city.

Remnants of a Victorian garden feature sitting in public woodland.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A mysterious pre-Incan ruin believed to have miraculous healing powers.