Hurricane Harbor, Arlington
Hurricane Harbor is Texas' largest water recreation park set on almost fifty acres. It features 10 separate entertainment areas which provide games, rides and other activities.
The park also has four full-size volleyball courts, two courts in a waist-deep pool and two 18-hole miniature golf courses. I haven't been inside but being right along the freeway, you can't miss it driving between Dallas and Fort Worth.
Address: 1800 East Lamar Boulevard, Arlington
Directions: Exit Interstate 30 between Dallas and Fort Worth. Take either Texas 360 North or Texas 157 North to Lamar Blvd.