It's not always easy to connect with Mother Nature when you're sitting in your Civic in bumper-to-bumper traffic on Federal Highway, your necktie cutting off your circulation as you head to work at your Brickell high-rise. But take a quick ride up I-95 and you'll hit Oleta River State Park. Florida's largest urban park feels anything but urban. Hell, it could be Colorado, if Colorado had mangrove forests and sandy beaches. There are countless ways to spend a day (or night) at this sprawling green oasis. Take two wheels on the park's heart-pounding, gut-wrenching, off-road mountain-bike trails; bring your S.O. on a romantic nighttime kayak tour; rent a SUP on a summer afternoon; spend the night in an air-conditioned cabin; sun yourself on the sandy beach. It's a one-size-fits-all park — a lush wellspring of outdoor recreation that's well worth the $6 entrance fee.