Amid towering trees, a gurgling stream and cool misty rain, Keahua Arboretum, east of town, makes a nice little picnic spot. The Department of Land & Natural Resources planted mini groves of teak, eucalyptus and shower trees in the 1940s to create an outdoor nature classroom, showcasing the benefits of forest management.

Avoid the area at night, when it becomes the scene for rave parties.