In 2000 a Swiss foundation launched a campaign to determine the New Seven Wonders of the World. The ancient city of Petra, Jordan, is located in a remote valley, nestled among sandstone mountains and cliffs. It was chosen as one of the new Seven Wonders. It was purported to be one of the places where Moses struck a rock and water gushed forth. Later the Nabataeans, an Arab tribe, made it their capital, and during this time it flourished, becoming an important trade center, especially for spices. Noted carvers, the Nabataeans chiseled dwellings, temples, and tombs into the sandstone, which changed color with the shifting sun.

Source: Britannica