The site consists of two hills (a feature from which the site gets its name), and there was a town below the east hill. On the east hill is a temple of Hathor dating back to the Third dynasty. This was rebuilt in the Middle Kingdom and was still in use in the Ptolemaic Period.
Tombs, mainly of the First Intermediate Period, are found on the west hill. Finds from the Predynastic period suggest that the cemetery at least was already in use then.
Gebelein in Digital Egypt
Gebelein in Global Egyptian Museum