Great Wolf Lodge has the northeast’s largest indoor water park. The 78,000-square-foot space is open all year, and there is also a smaller outdoor pool area open in summer. The indoor park has an interactive treehouse water fort with 12 levels, a giant wave pool, a lazy river, an area to shoot water hoops, two whirlpools (one for adults only) a water roller coaster, four tube slides, two body slides and kiddie slides.