Fort Mackenzie is a four-story interactive treehouse water fort offering 12 levels of super-soaking fun for the family. Younger kids can climb with their parents to reach the slides at the top. The older ones will love making their way over suspension bridges and cargo nets to spray stations and soaker buckets. (Watch out below!) The GREATEST of soaker buckets is the 1,000-gallon tipper that sits atop Fort Mackenzie. Every few minutes, the warning bell clangs, and the bucket begins to tip its contents over the roof and onto the giggling group below.