NORTH TOWNSHIP, Ind. — A massive floating waterpark has officially opened on Lake Michigan for the summer -- and the operator says it's 25 percent larger than last year.

WhoaZone is located at Whihala Beach, Ind., about a two-hour drive from Milwaukee. The park opened on June 23 and will remain open until August 19 -- as long as the weather permits. The park has four levels of challenges -- ranging from simple running and relaxing to climbing an jumping obstacles. 

The park is designed to be fun for the whole family, the only stipulation is you must be 7 years or older and at least 45" tall. 

Tickets start at just $20. For more information on WhoaZone, click here.