Water World is a water park that is part of the Hyland Hills Park and Recreation District and located in Federal Heights, Colorado, roughly 10 miles north of downtown Denver, Colorado. The park first opened in August 1979 with the first two waterslides in the state of Colorado, the Bonzai Pipeline. Water World is generally open from Memorial Day th…Water World is a water park that is part of the Hyland Hills Park and Recreation District and located in Federal Heights, Colorado, roughly 10 miles north of downtown Denver, Colorado. The park first opened in August 1979 with the first two waterslides in the state of Colorado, the Bonzai Pipeline. Water World is generally open from Memorial Day through Labor Day, but may be closed some school days.