While many would say the Venetian Pool at 2701 De Soto Blvd. in Coral Gables is the obvious winner, there's another spring-fed swimming hole in Miami-Dade that deserves attention and attendance. The 35-acre lake that serves as the centerpiece of the Larry and Penny Thompson Park boasts white sandy beaches and three water slides that are open on weekends throughout summer. Not only do bathers have more space to play around in, but bored landlubbers can make use of paddleboats or fish from the pier. There's much more to the park than just water activities. Camping, bridle trails, hiking paths, and playgrounds are spread over 270 acres. An almost secret treat in South Miami-Dade, and, as pools go, a natural source of wonder and fun.