A network of ancient Egyptian tombs built into the cliff face along the Nile.

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

The largest known Ancient Egyptian obelisk.

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

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

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

Ozymandias’ time-keeping temple.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

Located within a historic park, the beacon is the oldest standing structure in Miami.

Former villa and estate of James Deering developed to preserve native tropical forests.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

The earliest known map to show America, discovered by accident at a Paris bookshop.