Opened in 2018, this 4-acre, 3-level indoor/outdoor waterpark is as upscale as a water park can be, with dedicated recreation zones for adults, young children, and families. The one big “but” here is that SoundWaves is reserved exclusively for guests who book the SoundWaves overnight package at Opryland, so you can’t just show up and pay to enjoy the park. I only recommend staying at Opryland if you have kids or during the holidays, so if you meet both criteria, your kids will probably think you’re the coolest parents on earth if you do this joint holiday-waterpark combo. Indoor water attractions are open year-round with outdoor attractions open May through Labor Day, including outdoor pools equipped with movie screens. Year-round attractions include a slide tower, rapid and lazy rivers, activity pool with rock climbing, obstacle courses, basketball, an adults-only indoor pool and bar, cabana rentals, and a flowrider surfing simulator. So there’s lots to do, but to make it worth your while, you’re going to have to spend at least a whole day there, so if this is your first trip to Nashville, don’t waste one of your days at a water park.