USA Manatee Lagoon opens in Palm Beach County By Robert Silk / February 10, 2016 Share 1 -- Florida Power & Light (FPL) has opened a manatee-viewing center in Palm Beach County. Officials cut the ribbon for Manatee Lagoon: An FPL Eco-Discovery Center on Feb. 5. The visitor center at Manatee Lagoon. The 16,000-square-foot center sits on five acres and overlooks the outflow from FPL’s adjacent Riviera Beach Next Generation Clean Energy Center. The outflow draws herds of manatees in search of warm water during the cool winter months.Manatee Lagoon has two levels of observation areas as well as interactive indoor exhibits.Admission is free. The visitor center is open 9 to 4, Tuesdays through Sundays. Go to www.visitmanateelagoon.com for directions, additional information and to view the museum’s manatee cam.