The ancient city of Berenice, named by Ptolemy ll, became a trading port in 275 BC. A ruined Temple of Semiramis is located near the modern town; inland, there are the remains of the emerald mines of Wadi Sakait, which were worked from Pharaonic to Roman times. The coast is lined with mangrove swamps and unspoiled bays and coves. Offshore, visit the tectonic island of Zabargad a geological phenomenon which is also famous as the source of the semiprecious gem olivine, mined here form 1500 BC until the mid-20th century. From Peridot Hill there are breathtaking views of the surrounding blue lagoons, rich in marine life and home to many dolphins.