6. Schlitterbahn Galveston Island

Location: Galveston, TX

This family-owned company has a series of parks in Texas and one in Kansas. Most of their parks are outdoor, but the park in Galveston has one indoor section. Still, these people are seemingly important to water-related fun-tivities. They are credited with inventing the lazy river and blaster technology, which we found out has nothing to do with Star Wars. Instead, it powers uphill water rides, which is much less cool, though still significant.