For many years, the ruins at Petra were the only relic of the Nabataean culture that could be visited. There was a tendency to treat Petra as if it were unique: a singular artifact, the only creation of this particular culture.
In fact, the Nabataeans controlled an area that stretched across a large part of the Middle East, and left behind numerous sites. An increasing number of these sites have now been opened up to tourism.
For a fuller list of Nabataean archaeological sites, see Wikipedia’s page about the Nabataeans.