A lazy river is a slow-moving, relatively shallow channel of water that runs in a loop throughout the entire park. These are excellent locations for a bit of relaxing after you have been on a few rides. Lazy rivers are also useful for children that are not yet strong swimmers, as the water is usually shallow and inner tubes are given to children for floating. You should be able to get in and out of the river at several locations in the park.
No water park would be complete without a few water slides. The exact setup of slides is different at every park, but nearly all parks have a couple of tube slides and a couple of body slides. Slides can vary from short and simple to very long and twisty, with many offering massive splashdown areas at their bases. Every slide in the park is likely to have a different height requirement for riders, based on the physics of the slide.
Indoor water parks are often filled with excited, loud children. If you are attending the park to get a little relaxation, you may feel more at home visiting the adults-only area. Many parks have special zones dedicated to adult relaxation, with hot tubs, spas, and the occasional in-pool bar. It is best to check with your indoor park before you visit to get an idea of the amenities that are available for grownups. If you do bring kids into the park, check in on them between your relaxation sessions.
Rules vary from park to park about bringing food in, but you should be able to find a few dry areas to sit and enjoy a meal with your family. If you are planning on spending the entire day at the park, call ahead to find out if you can bring snacks or if they are available on-site. Set a meet-up time and place as soon as you enter the park so the whole family can get together at lunchtime and to replenish their energy.