Visit Nizwa, the capital of the interior and birthplace of Islam in Oman. See the famous Round Tower Fort, built in the 17th century, and the Nizwa Souq, known for its Friday cattle auction, hand-carved Khanjars, and silver jewelry. Explore Jabrin Castle, a photostop in Bahla Fort built in the late 17th century, and admire its intricate ceiling paintings and wood carvings. On the way to Muscat, stop at the picturesque village of Birkat Al Mauz, located at the base of the Jebel Akhdar (Green Mountains), and take a walk through its oasis and date plantations. Finally, return to Muscat.