Wall Springs Park is Palm Harbor's best local park, with boardwalks over spring-fed water, tidal wetlands, observation decks, and shaded walking paths. It is compact, easy, and good for birding, especially in the cooler morning hours.
The park connects to the Pinellas Trail, so it works well as a cycling stop between Dunedin and Tarpon Springs. Bring binoculars if you have them; herons, egrets, ospreys, and mullet are common around the water.