Inhambane is also one of the oldest ports on the Eastern Coast of Africa, where, back in the early 16th century, Portugese explorers established a trading post for slave traders. The town is located in southern Mozambique, lying on Inhambane Bay, four hundred and seventy kilometers northeast of Maputo. Whale Sharks and Manta Rays inhabit the coastline all year round but are in larger numbers in the summer months (November to March). Humpback whales usually arrive around mid June and are present until mid October. The natural vegetation of the coastal plain is dune forest, but this has largely been replaced by coconut palms, planted by the Portuguese and local Bitonga people to supply the thriving copra trade. Activities include: Scuba diving, snorkelling and boat based activities.