Boundary Island is a beautiful tropical island located in the north east of Linghsui County, 1.2 nautical miles off the coast. The island gets its name from the fact that it lies on the boundary of the tropical and subtropical climate zones. In 2013 it was designated a 5A-Grade Scenic Spot by the National Tourism Administration in 2013.
The island has a wide variety of activities available throughout the year and is also home to the Dolphin Cove aquarium where visitors can get up close to a variety of marine life. A day out on Boundary Island is a great start to any trip to Lingshui!