Walk around the park and the connected Japanese flower garden AKA the Arboretum.Take tons of pictures around the park or shoot some hoops at the connected basketball court or bring your little ones to one of the many play grounds.
Take a dip at the fun cheap Aquatic center,it has a hot tub for the adults (16+) or slide down the large water slide into the huge lap pool then jump off the diving board or rope swing.