The Kartrite Resort & Indoor Waterpark, located at 555 Resorts World Drive in Monticello, New York, is a premier family destination nestled in the scenic Catskill Mountains. As New York’s largest indoor waterpark, it boasts over 80,000 square feet of aquatic fun, including thrilling water slides, a lazy river, and a surf simulator, all within a climate-controlled environment maintained at a comfortable 84°F year-round .