The rocks in this arid basin leave trails of movement behind them.

Rippling sand dunes frozen in the Arizona rock.

This network of roads is one of the most unique Etruscan creations ever discovered.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

Built by the Ancient Greeks, this chariot bridge is still in use today.

This legendary city has been a tourist attraction for centuries.

A solemn reminder of the infamous World War II war crime that massacred almost all the men in a small Greek town.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

Remnants of successive wars and Muslim colonialism in the 11th century.

A sacred lake with thousands of sacred carp and a biblical history.

Mausoleum and Holy Seat of Antiochus I of Commagene.

An abused and forgotten metropolis, abandoned for centuries.

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

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

The remains of what was, not so long ago, the world's largest city.

Crumbling remnants of what was once a booming town full of silver.

Grotesque statues of figures from Buddhist hell haunt the temple's Sin Park.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.