Petra is one of the world's most famous historical and archeological sites. The city is famous for its rock-cut architecture and water conduit system. It was a capital of the Nabataean Arabs from 4th century B.C. Petra is half-built, half-carved into the rock, and is surrounded by mountains riddled with passages and gorges. Another name for Petra is the Rose City due to the color of the stone out of which it is carved. Carved directly into sandstone cliff the prehistoric Jordanian city of Petra was hidden from the Western world for hundreds of years, until a Swiss explorer introduced Petra in the early 1800s. This ancient city is located between the Dead Sea and the Red Sea.