Turn off your iPhone. Cross the long boardwalk to the beach, and enjoy a rare stretch of sand unblemished by condos or highway traffic. Slip a kayak into the gentle, cool water of the Lake Worth Lagoon. Paddle softly past the mangrove trees, keeping your eyes peeled for the spindly, regal body of a blue heron or an egret hiding in the branches. In the luscious quiet, you can hear the buzzing insects and spot the occasional silver fish jumping out of the water. The trees look prehistoric at low tide. White trunks and branches, wild and tangled, give a glimpse of an era before humans soiled this place.