Wisconsin Dells, Wisconsin - Where is the Lost City of Atlantis? For Midwesterners, it’s at Wisconsin Dells. For this summer, Mt Olympus Water & Theme Park debuted what it’s calling the Midwest’s largest water play structure.

The Lost City of Atlantis is six stories high and covers a total of 3 acres. Costing Mt Olympus over $4 million, this massive water playground was built by WhiteWater, a Canadian company. It is called an “AquaPlay Giant RainFortress,” according to NewsParcs.com.

While most play structures are for children, this one caters to the entire family. For the younger kids, it includes four kids’ slides designed for the little ones to traverse into shallow pools.

There are also two raft slides that allow the whole family to ride together. The Family Raft Slide features sharp turns, allowing the rafts to slide up the wall while its steep drops keep up the thrills.

It’s the Boomerango Family Tube Slide, though, that is the stand out. This slide starts out with a steep drop into a water-soaked quarter pipe. Here, riders drop in and then slide up, “going vertical,” and experiencing “a shot of weightlessness,” according to the park’s press release. Riders then drop back down and splash into a pool.

Rounding out the collection of slides on the Lost City of Atlantis is the Champagne Bowl Slide. Called “ever-popular” by the Minneapolis Star Tribune, this ride starts off, not unlike the Boomerango: with a steep drop into the main event. In this case, riders are sent swirling around the sides of a giant bowl, going first around the walls and slowly around the base of the bowl until they plunge down through a hole in the center, and into the ride’s lagoon.

The massive water structure also features a massive dump bucket that will dump gallons of water on any innocent bystanders that happen to be under it when it tips. It also features the Lost City Geyser, which will jet water 120 feet in the air before it rains back down on anybody within its reach.

The Lost City of Atlantis is now open at Mt Olympus.