22 Unforgettable Adventures in National Parks Across America

14. Snorkeling Through an Underwater Trail in Biscayne National Park, Florida

While most national parks showcase mountains and forests, Biscayne National Park is over 95% water, making it a hidden gem for marine adventurers. Located off the coast of Florida, this subtropical paradise offers some of the best snorkeling in the U.S. One of its most unique experiences is snorkeling the Maritime Heritage Trail, a fascinating underwater museum of shipwrecks that tells the story of Florida’s maritime history. This trail lets snorkelers explore centuries-old wrecked vessels that have become home to colorful coral, vibrant marine life, and schools of fish. One of the most famous wrecks is the Mandalay, a 1920s luxury schooner that met its fate on the shallow reefs. Over time, its remnants have transformed into a thriving artificial reef, now teeming with angelfish, parrotfish, and even sea turtles. Beyond shipwrecks, Biscayne is part of the Florida Reef, the third-largest coral reef system in the world. Snorkelers can witness living coral gardens, darting reef sharks, and stingrays gliding along the ocean floor. The park also protects the mangrove coastline, which serves as a crucial habitat for young marine species. Whether you’re a seasoned snorkeler or a beginner, Biscayne’s crystal-clear waters provide a rare glimpse into an underwater world that few national parks can offer.