Island

Buck Island was one of the first marine areas in the world given national monument protection, and access is strictly through licensed concession boats out of Christiansted - you cannot simply turn up. The underwater trail runs through a barrier reef of elkhorn coral in a lagoon, with signs on the seabed, and the fish density inside the reef is far beyond anything reachable from a beach. Most trips also stop at Turtle Beach on the island’s west end, a stretch of empty white sand. The crossing takes about half an hour and can be bumpy. Full-day trips include lunch and more swimming time.

Caladesi can only be reached by boat, and that single fact keeps it emptier than any comparable beach on this coast. The ferry runs from Honeymoon Island every hour and gives you a four-hour window on the island, which is enough for a long swim and a walk up the beach away from the crowd near the dock. The Gulf water is warm and shallow with fine white sand. Behind the beach a marked kayak trail runs through mangroves in the bay. There is a snack bar and restrooms near the marina and nothing at all beyond that.

Getting to the Dry Tortugas is most of the experience - two and a quarter hours by ferry across open water, or a seaplane if the budget allows. What you arrive at is Fort Jefferson, an enormous unfinished nineteenth-century fort covering almost an entire small island, surrounded by water clear enough to see the coral heads from the walls. Snorkelling straight off the beach is the best in the state because there is no run-off and almost no boat traffic. Bring everything you need; there is no shop, and the ferry leaves on schedule with or without you. Rough seas make the crossing genuinely unpleasant, so watch the forecast.

Flamenco earns the superlatives. A mile-long horseshoe of white sand enclosing water that grades from clear to turquoise to deep blue, with a reef at the eastern end for snorkelling and surf gentle enough for children through most of the bay. The odd landmark is a rusting US Navy tank left on the sand from when Culebra was a bombing range, now covered in graffiti and universally photographed. Facilities exist - kiosks, restrooms, showers, camping - which is unusual for a beach this good. Getting there means the Culebra ferry from Ceiba or a small plane, and the ferry is the constraint.

Cayo Aurora - universally called Gilligan’s Island - is a small mangrove key reached by a ferry that runs every hour or so from the Guánica shore. What makes it work with children is the geography: channels between the mangroves are shallow, clear, protected and warm, so they function as a set of natural pools with fish and starfish in them. There are picnic tables, boardwalks and restrooms and nothing else, so bring food and water. It closes on Mondays. Weekends bring a lively Puerto Rican family crowd with music and coolers, which is either the appeal or the reason to come midweek.

Mosquito Bay holds the record for the brightest bioluminescence measured anywhere, and the difference from the mainland bays is obvious the moment you are on it: the water does not just sparkle, it lights up enough to see by, and fish moving beneath the boat draw glowing wakes. Swimming is prohibited in order to protect the organisms, so this is a paddle-only experience. Getting there means the Vieques ferry from Ceiba or a short flight, which turns the bay into a two-day trip rather than an evening. Tours are new-moon dependent. Book both the ferry and the tour well ahead.

Peanut Island is a spoil island in the Lake Worth Inlet reachable only by a short water taxi, which is half the fun for kids. On the north side a rock breakwater encloses a shallow snorkelling lagoon where the water flushes clean with the tide and holds a surprising amount of fish for somewhere this close to a city. The lagoon runs from about two to ten feet and is best near high tide. Onshore there is a twenty-site tent campground, a loop path and picnic pavilions. The concrete bunker built as a fallout shelter for President Kennedy when he wintered in Palm Beach is still on the island but is closed to visitors until further notice, so do not plan the trip around it. Bring everything; there are restrooms and very little else.

Sun Bay is a public balneario, which means facilities - restrooms, showers, shelters, a large parking area - attached to a beach that on most days is close to empty. The bay is broad and shallow with very little wave action, so it suits small children, and the sand runs for over a mile so you can always walk away from whoever else is there. Vieques’s free-roaming horses graze the grass behind the beach and wander onto the sand, which is one of those things children do not forget. Camping is permitted with a permit. It is the easiest beach on the island to reach with a hire car.

Tamarindo is not much of a sunbathing beach - narrow, some rock, modest sand - and that is not why anyone comes. Just offshore the bottom is turtle grass, and green sea turtles graze it reliably enough that a morning snorkel here is close to a guaranteed encounter. They are unbothered by swimmers who keep their distance, and the water is shallow and generally calm. There is also decent reef towards Luis Peña Cay. There are no facilities at all, so bring water and gear. Regulations require keeping a respectful distance from turtles; do not touch or chase.

Paddle to your own island campsite on Indian Lake for a family camping adventure that feels like true wilderness. The DEC maintains 55 island and shoreline campsites accessible only by boat. Kids love the excitement of paddling to their campsite and having an island all to themselves. Indian Lake is large and scenic with mountain views from the water. The campsites have fire rings and pit toilets. The town of Indian Lake is nearby for supplies. This is a more accessible alternative to the Saranac Lake Islands with similar magic.

Camping on one of the islands in Lake George is a bucket-list Adirondack experience. Over 300 islands dot the lake and the DEC maintains campsites on many of them accessible only by boat. Kids are thrilled by the adventure of paddling or boating to a private island campsite surrounded by clear water and mountain views. Sites include fire rings and pit toilets. The Glen Island, Long Island, and Narrow Island groups are the most popular. You will need your own boat or canoe to reach the sites.

A beautiful beachfront campground on the North Shore with a long sandy beach, calm water, and a small offshore island you can wade to at low tide. Goat Island (Mokuauia) is accessible by wading across the shallow channel and kids think it is the coolest thing ever to walk to their own island. The beach is quiet and uncrowded compared to town. Tent camping is available right behind the tree line. Cabins and yurts are also an option for families who want more comfort. This is beach camping at its finest.

Paddle to a private island campsite on one of the Saranac Lakes for an unforgettable family camping trip. The DEC maintains 87 primitive island campsites across Lower, Middle, and Upper Saranac Lakes, each with a fire ring, privy, and picnic table. Kids feel like explorers paddling to their own island and spending the night surrounded by water and wilderness. The Lower Saranac launch is the easiest access point. Loon calls at sunset and stars with zero light pollution make this a magical experience.