St. John's Island is one of the Southern Islands of Singapore, located about 6.5 kilometers south of the main island. It covers an area of approximately 40 hectares and is known for its natural beauty, featuring sandy beaches and lush greenery. The island is accessible by ferry and is a popular spot for picnics and outdoor activities. Historically, St. John's Island served various purposes, including a quarantine station and a prison. Today, it is part of the Southern Islands Marine Park and is home to diverse marine life, making it a great destination for nature enthusiasts and those looking to escape the city.