Koh Matsum, often confused with or referred to as Pig Island, is located near Koh Samui in Thailand. It's known for its serene beaches and, notably, for being home to a number of friendly pigs that roam the beach, which has become a popular attraction for tourists. The island provides a peaceful escape from more crowded tourist areas, with clear waters and beautiful natural surroundings, making it an ideal spot for relaxation and beach activities.