Tanga is a city of about 300,000 inhabitants and the main industries are coffee, tea, sisal and cotton. You can visit a tea or coffee farm and the Amboni Caves (large limestone caves) or Tongoni Ruins, which contain a mosque and tombs from the 15th century. Pangani is a beautiful town on the beach that is perfect for those seeking peace and relaxation. Both places can be reached from the Usambara Mountains in about three hours.