The Sisters' Islands are a pair of small islands located in the southern part of the Singapore Strait. They are known for their rich marine biodiversity and are part of the Sisters' Islands Marine Park, which was established to protect the area's unique ecosystems. The islands are popular for activities such as snorkeling and diving, attracting both locals and tourists. The larger of the two islands, Sisters' Island, features sandy beaches and lush vegetation, while the smaller island, St. John's Island, is often used for research and conservation efforts. The islands are accessible by boat and offer a peaceful escape from the bustling city life of Singapore.