In addition to the four swimming pools, which are heated, there are also three whirlpools if you want to enjoy the jets. The pool complex features four refreshing swimming pools spread throughout, all of which kids and adults alike can splash around. Here are some of the other activities located in the complex. It is 6.5 acres of aquatic fun and amenities. The Las Vegas MGM Grand pool complex is more than just the lazy river and a singular pool. Other Activities at the MGM Grand Pool Complex