One of the characteristics of Petra are the ancient tombs that occupy a vast area. See here the giant rocks in the Petra area. Together, the rocks, tombs, and the surrounding valley provides an excellent sense of history of Jordan.
The city of Madina is the second holiest city for the Muslims. It is located on the western part of Saudi-Arabia, a few hundred kilometers north of the city of Makkah. Prophet Muhammad and his closest companions are buried in this city.
Jeddah is the second largest of Saudi-Arabia (after Riyadh). The city is located on the western side of the country and is a landing port for the pilgrims visiting the holy places of Makkah and Madinah.