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 & Adventure of Life Beneath the Sea

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

Jump in!

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

    TOUR Jules' Undersea Lab

    SCUBA dive into Jules’ Undersea Lab, a historic undersea research station. You will be guided through Jules’ Lagoon and its underwater artifacts before being escorted into the Lab through its moon pool. During this three-hour experience, you will discover the habitat’s history, technology, and what it takes to live and work beneath the surface.

    Participants must be Open-Water SCUBA certified.

    Open Water students and Discover Scuba Diving participants may join when accompanied by their SCUBA Instructor, who is responsible for them during the dive.

    BOOK ONLINE

  • Live. Learn. Explore Underwater Living

    For 24 hours, leave the surface behind and experience Jules’ Undersea Lab as an Aquanaut; living and learning beneath the sea in a historic working undersea habitat. Complete underwater tasks, observe marine life and enjoy lagoon dives with your buddy (no solo diving) as you complete your Aquanaut experience.

    SCUBA divers must have completed a dive within the six months prior to their Aquanaut Mission.

    Minimum two participants.

    For more information:

    Click “Learn More”

    or

    Call 305-451-2353

    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.