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Atlantis Marine World

1

Long Island

Atlantis Marine World

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Perched along the Peconic River on Main Street in Riverhead, this full-scale aquarium draws visitors into an immersive underwater world filled with captivating marine creatures and hands-on discovery. Playful seals make their entrance memorable right from the start, welcoming guests into the themed Lost City experience where exploration unfolds at every turn. The real magic happens when you board the Atlantis Explorer, a river tour that takes you out onto the water to witness Long Island's natural ecosystem firsthand. Winter brings a quieter, more intimate feel to these excursions—fewer crowds mean you'll spot wildlife without the seasonal bustle. Whether you want to get soaked or stay dry is entirely your call. Beyond the exhibits and tours, the facility partners closely with Cornell Cooperative Extension Marine Program and anchors New York State's only authorized marine animal stranding and rehabilitation center. The Riverhead Foundation for Marine Research and Preservation operates from this location, making education and conservation core to everything that happens here.

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