Oman, a nation on the Arabian Peninsula, has terrain encompassing desert, riverbed oases and long coastlines on the Persian Gulf, Arabian Sea and Gulf of Oman. Wahiba Sands is a region of dunes inhabited by Bedouins. The port capital, Muscat, is home to the massive, contemporary Sultan Qaboos Grand Mosque, and the old waterfront Muttrah quarter, with its labyrinthine souk and busy fish market