The soft sandstone made the mountains of Petra an ideal place to establish a society. Deep shelters and tombs are dug into the cliff walls.

The soft sandstone made the mountains of Petra an ideal place to establish a society. Deep shelters and tombs are dug into the cliff walls.

The soft sandstone made the mountains of Petra an ideal place to establish a society. Deep shelters and tombs are dug into the cliff walls.

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