Jules' Undersea Lab
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The world’s only underwater lab where recreational divers can experience living and sleeping underwater.
Once a research station and underwater hotel, now an educational attraction with MarineLab in Key Largo! Jules’ Undersea Lab was originally built as La Chalupa, a mobile undersea research laboratory and one of the most advanced habitats of its time. Over the years, it became famous as an underwater hotel where divers could live and sleep beneath the surface. Today, Jules’ is part of MarineLab Unde
05/06/2026
Trash Derby recap 🗑️
Our team took part in this year’s Florida Keys Trash Derby by searching right where we are every day… the lagoon!
Our team spent the day diving and working through the area to remove debris that’s built up below the surface over time. From smaller pieces to heavier items, everything was collected and brought out piece by piece 💪😎
By the end of the cleanup, a total of 1,023 pounds of trash had been removed from the lagoon, including two transaxles totaling 700 pounds 😮
Vintage Dive Day 🤿
NAUI led in-water training right here in the lagoon on this day, bringing both the history and the skills side of diving together 😎
Here’s a closer look at the extraction training at Jules’ Undersea Lab 👏🤿
We recently had the Martin County Sheriff's Office Dive Team out at the lagoon, where they used the habitat to run an extraction scenario 😎
04/10/2026
We recently had the Martin County Sheriff's Office Dive Team out at Jules’ Undersea Lab 👏🤿
During their time here, the team used the lagoon and habitat to run an extraction training, practicing recovery techniques in a controlled underwater environment and working through skills they use in real-world situations.
Using the lagoon like this allows dive teams to train in a unique setting, adding another layer to how underwater skills can be developed and applied! 😎
03/30/2026
In the Florida Keys this April?
The History of Diving Museum and NAUI Worldwide are hosting our annual Vintage Day Day on
Saturday, April 11th 🤿
Dive into the lagoon at MarineLab Undersea Park with a classic double-hose regulator, and watch hard hat diving demonstrations at noon with Trident Surface Supplied Diving, LLC and Brass Hat Diver!
You can get your tickets here: https://shop-diving-museum.company.site/products/Vintage-Dive-Day-2026-Sat-April-11th-p645613534
Questions? Concerns? Leave a comment or shoot History of Diving Museum a message.
See you there in Key Largo!
02/24/2026
Thank You, Key West Lodge No. 64 of Free & Accepted Masons of Florida!
We are grateful to Key West Lodge 64 for their generous $1,000 Mission Sponsorship in support of the Veterans’ Decompression Project. Their contribution directly supports this pilot initiative at Jules’, helping create an opportunity rooted in service, education, and exploration.
Thank you for supporting veteran-led initiatives and investing in a mission that connects science, learning, and purpose!
👉 If you would like to support the Veterans’ Decompression Project, donations help offset mission costs, including program materials, habitat operations, dive logistics, and participant support. Every contribution moves this pilot mission forward.
Learn more and contribute at https://ow.ly/ptOb50Yl3v6 🔗
01/21/2026
Kicking off 2026 with the first PADI Instructor Exam of the year 👏🤿
This month, we hosted the first 2026 PADI Instructor Exam, welcoming dive professionals as they took the next step toward teaching and mentoring future divers.
Instructor Exams mark the transition from experienced diver to educator, where candidates are evaluated on real-world skills, leadership, and the ability to guide others safely underwater.
We were glad to host such a strong group of candidates to start 2026 🤩
Happy New Year! 🎉
We’re open today and welcoming visitors from 11:3p am – 4:30 pm.
If you’re easing into the new year or looking for something to do today, feel free to stop by. We’d love to see you!
Click here to claim your Sponsored Listing.
Contact the organization
Telephone
Address
51 Shoreland Drive
Key Largo, FL
FLORIDA