A peaceful marina scene at sunset with boats docked, palm trees, a wooden pier, and a small shed on the dock, with clear skies and water reflecting the surroundings.
Fish
Divers in lagoon
Person scuba diving underwater, making a heart shape with hands, seen through a circular underwater viewing window.
Two people, one with snorkel gear, smiling while swimming in water near a dock and palm trees, with a building in the background.
A large white cylindrical tank labeled MarineLab Undersea Laboratory Museum, situated outdoors among trees with informational signs in front of it.
Three people in SCUBA gear smiling in the moon pool entry to Jules' Undersea Lab with bright green water, giving thumbs up.
Two children swimming in a lagoon, wearing life jackets and snorkeling gear.
Two people in scuba gear are looking through a large circular window of an underwater tunnel. One person is seated on a bench and the other is standing. The underwater environment is visible through the window. The room is decorated with a smiling su

Explore the science, history, and adventure of life beneath the sea.

Discover a place where undersea exploration connects with hands on learning. At MarineLab Undersea Park & Museum in Key Largo, you can visit historic undersea exhibits, snorkel with a marine science educator, dive Jules’ Lagoon and experience life inside Jules’ Undersea Lab.

MarineLab Undersea Park & Museum is a place where people can experience the history, science, technology, and adventure of living and working underwater.

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  • Three people in scuba gear smiling and posing in the moon pool entrance to Jules' Undersea Lab.

    TOUR Jules' Undersea Lab

    Dive into the history of undersea living

    SCUBA dive into Jules’ Undersea Lab, a historic undersea research station open to the public. Your Mission Director will guide you through Jules’ Lagoon and its underwater artifacts before escorting you into the Lab through its moon pool. During this three-hour experience, discover the habitat’s history, technology, and what it takes to live and work beneath the surface.

    Designed for certified SCUBA divers. Tanks and weights are included; additional rental gear is available.

    • Price: $110 per diver plus tax

    • Group size: Minimum 2; maximum 6 divers

    • Sessions: 8:30 AM and 1:30 PM

    • Advance reservations required

    BOOK ONLINE NOW
  • Two children swimming in a body of water, wearing life jackets and snorkel masks.

    SNORKEL with a Marine Biologist

    Let one of our marine science instructors teach you how to snorkel and learn about our undersea world! Ages 8 and up. $53 plus tax per person. 2 person minimum; maximum of 6 people. Includes snorkel gear. Sessions at 9:30 AM and 2:30 PM. Advance reservations required.

    BOOK ONLINE NOW
  • Two women, wearing Scout uniforms, sit at a table observing a school of scuba divers through a round, yellow-lit aquarium window inside a room decorated with a smiling sun wall hanging and nautical-themed items.

    SLEEP Underwater

    in Jules’ Undersea Lab and experience what it’s like to live in the sea! Includes meals, unlimited diving in the lagoon from Jules’, and optional specialties. An overnight stay is from noon until noon the following day.

    Online booking coming soon

    Call 305-451-2353

    LEARN MORE
  • Two scuba divers in full gear floating in water near a blue floating dock.

    DIVE the Lagoon

    Attention SCUBA instructors and dive shops! Our lagoon is a perfect location for your certification classes, from open water to instructor. It’s an open water location that is not affected by most weather!

    Access for divers and snorkelers with limited mobility coming soon!

    Call 305-451-2353

    LEARN MORE
  • A white underwater laboratory capsule with the words MarineLab, and Marine Resources printed on it, situated outdoors among trees and a fence.

    Undersea Lab Museum

    See what it was like to live and work in the sea…without getting wet! Free admission during park hours, Tuesday - Sunday 8 AM - 3 PM.

    LEARN MORE

MarineLab Undersea Park is very proud to partner with Ocean First Key Largo to provide SCUBA Instruction services and dive gear rentals.

For group environmental education programs, visit MarineLab Environmental Education Center.