A futuristic, brutalist masterpiece that is also strangely prison-like.

What happens when you cross a mayor and a painter?

An ancient Egyptian temple in the middle of Madrid, Spain.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Gigantic Romanian salt mines used to heal respiratory conditions.

Monasteries on rock pillars, once accessible only by frayed ropes.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Iconic pyramid from famed British architect Norman Foster designed to represent all of the world's religious faiths.

A modern tower, symbolizing the legend of a golden egg on top of the tree of life.

An entertainment center in a huge transparent tent.

The Avenue of Mausolea is a series of grand palatial tombs.

Light still pours into the ruins of this ancient Islamic observatory.

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

Live a night as a Byzantine King, with a minibar and private jacuzzi.