The ocean- and riverfront town is brimming with Old Florida enchantment on and off the water.Indian Riverside Park in Jensen Beach, FloridaCredit: Martin County Office of Tourism & MarketingThough Jensen Beach earned the nickname “Pineapple Capital of the World” thanks to its thriving pineapple farms in the late 1800s, today it's best known as a relaxed waterfront town with beaches, fishing, pastel cottages, fresh seafood, and a quaint downtown.…