The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

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

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

An endless sea of white conical domes.

Ancient serpentine sacrifice holder that has stood the test of time.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

The largest known Ancient Egyptian obelisk.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Ozymandias’ time-keeping temple.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

Legend says this sacred tree was a gift from goddess Athena.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

An ancient octagonal weather station named for the eight Greek gods of wind.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A taste of Middle Earth, in the middle of the Bayou City.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

Abandoned silver mine strewn with wrecked and twisted structures.

The remnants of the base where US Army troops learned how to fight in extreme conditions.