Petra is the treasure of ancient world, hidden behind an almost impenetrable barrier of rugged mountains, boasting incomparable scenes that make it the most majestic and imposing ancient site still-standing nowadays.. It has been said "perhaps there is nothing in the world that resembles it", actually, for sure, there is nothing in the world that resembles it. The rock-carved rose-red city of Petra is full of mysterious charm, it was "designed to strike wonder into all who entered it".