The Dias Museum Complex is located in Mossel Bay, South Africa, and showcases the rich maritime history of the region. It is named after Bartolomeu Dias, the Portuguese explorer who was the first European to sail around the southern tip of Africa in 1488. The complex includes several attractions, such as the Dias Maritime Museum, which features exhibits on shipwrecks and navigation. Another highlight of the complex is the Post Office Tree, a historical landmark where sailors used to leave messages for passing ships. Visitors can also explore the Mossel Bay Museum, which offers insights into the area's cultural heritage and natural history.