A New Indoor Water Park Is Coming to the Catskills Submitted by Marisa Iallonardo on Thu, 01/18/2018 - 4:00pm Families who'd rather swap their snowsuits for bathing suits will soon have one more option: the Kartrite Hotel & Indoor Waterpark, which will open in Monticello, New York, in early 2019. The best part? It's located in Sullivan County, an easy family-friendly destination for both daytrippers and those in need of a weekend getaway. Read on for more details, and sign up for our newsletters to stay up to date. Read more.