Agios Stefanos Beach is a coastal destination located near the town of Kefalos on the Greek island of Kos. The beach features a mix of sand and pebbles, with generally clear, shallow waters ideal for swimming and snorkeling. A prominent feature is the ruins of a Byzantine basilica situated directly on the beach, adding historical interest to the seaside experience. Just offshore lies Kastri Island, accessible by swimming or boat, topped with a small church that visitors enjoy exploring and ringing the bell. While facilities are somewhat limited, the beach offers a relaxing atmosphere and scenic views.