Definitely worth visiting as part of a trip to Persepolis are these sites The rock tombs of Naqsh-e Rostam are magnificent. Hewn out of a cliff high above the ground, the four tombs are believed to be those of Darius II, Artaxerxes I, Darius I and Xerxes I. the tombs of the later Artaxerxes above Persepolis were modelled on these. The openings lead to chambers, where bones were stored after the vultures had picked them clean.