Atlantis Banquets & Events
Make your next event unforgettable at Atlantis Banquets & Events—Long Island’s premier waterfront event destination.
Located along the scenic Peconic River, in Riverhead, the gateway to the North and South Forks of Long Island, Atlantis Banquets & Events offers a collection of stunning, immersive, and fully customizable venue options ideal for corporate functions, social celebrations, galas, retreats, and destination-style gatherings. From an elegant ballroom to a spectacular aquarium setting to outdoor waterfront spaces, Atlantis delivers a rare combination of visual impact, convenience, and exceptional service that planners trust.
Why Event Planners Choose Atlantis Banquets & Events:
Waterfront Setting & Immersive Venues -
Host your event in one of their extraordinary spaces, including the striking Sea Star Ballroom overlooking the Treasure Cove Resort Marina, the dramatic Aquarium galleries surrounded by exotic marine life, and flexible meeting rooms designed for everything from board meetings to large-scale banquets. Waterfront and scenic outdoor areas create gorgeous backdrops for receptions and seasonal events.
Two On-Property Hotels -
Make multi-day events seamless with accommodations just steps from the venue.
• The Hyatt Place Long Island/East End – Modern, upscale rooms with river views, meeting spaces, and premium guest amenities.
• The Preston Hotel – A chic, boutique-style hotel located on property, offering stylish guest rooms and suites perfect for VIPs, planners, speakers, and groups seeking a modern, elevated stay.
With both properties onsite, your attendees enjoy easy access, walkability, and enhanced comfort throughout their event.
A Summer Event Paradise
Atlantis Banquets & Events is the perfect seasonal location for warm-weather programs, thanks to unique onsite and nearby activities:
• The Long Island Aquarium offes an engaging break or added experience with animal habitats, colorful aquatic displays, and interactive moments attendees will love.
• Long Island Canoe Kayak Rentals allow for fun, memorable team-building and outdoor recreation.
• Just minutes from the famed Hamptons on the South Fork and the North Fork’s Historic Wine Trail, planners can elevate retreats and multi-day itineraries with vineyard tours, farm-to-table dining, or upscale coastal experiences.
Flexible for Events of All Sizes -
Whether you're planning a 20-person executive meeting or a 325-guest gala, Atlantis Banquets & Events provides adaptable layouts, advanced A/V, in-house catering, and seamless transitions between spaces—ideal for conferences, award dinners, product launches, fundraisers, and more.
Full-Service Event Team -
Our experienced planners, catering team, and trusted vendor partners work closely with event professionals to ensure flawless logistics, exceptional hospitality, and memorable guest experiences.
Perfect For
• Corporate meetings & retreats
• Conferences & seminars
• Summer events & waterfront receptions
• Galas, fundraisers & award dinners
• Social celebrations & milestone events
• Team-building & multi-day experiences
• Destination-style gatherings
Bring Your Next Event to Life
With unmatched waterfront settings, on-site accommodations, immersive venues, and access to signature Long Island experiences, Atlantis Banquets & Events is where planners turn for extraordinary events that stand out on any marketplace platform.