Bodrum Castle, also known as the Castle of St. Peter, is a historic fortress located in Bodrum, Turkey. Built by the Knights Hospitaller in the 15th century, it was constructed using stones from the ancient Halicarnassus Mausoleum, one of the Seven Wonders of the Ancient World. The castle served as a defensive stronghold and has been well-preserved over the centuries. Today, Bodrum Castle houses the Museum of Underwater Archaeology, showcasing artifacts from shipwrecks and ancient maritime history. Visitors can explore its towers, walls, and beautiful views of the Aegean Sea, making it a popular tourist destination in the region.