JFK Hotel Mastar Daecheon Water Park is a water park near Daecheon Beach in Boryeong, with a wave pool and slides for children. The wave pool and several slides form the core of the park, and visitors enter with discount passes. Crowds are light, so waits for the rides are short, and there is a one-hour break period. About six or seven rides operate, so children in elementary school and older can lose interest quickly.