1 Big Sustainable Island

Floating Island Retreat: Lakefront Cabin w/ Sauna

A unique nature stay for outdoor retreats on Annabessacook Lake in Monmouth, Maine — near Winthrop.

Quick Answer: Floating Island Retreat: Lakefront Cabin w/ Sauna is The Nautilus is a floating love letter to reinvention — a cabin, a tiny home, and a houseboat all rolled into one quietly wonderful idea. Moored beside 1 Big Sustainable Island, it lets you wake to gentle waves at your door, watch the sunrise from bed, and step straight onto a floating porch for morning coffee. It’s proof that with a little imagination (and a lot of care), something old can become something entirely new on Annabessacook Lake in Monmouth, Maine.

The Nautilus is a floating love letter to reinvention — a cabin, a tiny home, and a houseboat all rolled into one quietly wonderful idea. Moored beside 1 Big Sustainable Island, it lets you wake to gentle waves at your door, watch the sunrise from bed, and step straight onto a floating porch for morning coffee. It’s proof that with a little imagination (and a lot of care), something old can become something entirely new.

Guest Reviews from Revyoos — Showing 10 of 143 Reviews

Emily July 14 2023
Rating: 5.0 / 5

Such a nice space and great experience. Our host was very helpful.

Andy July 13 2023
Rating: 5.0 / 5

An absolutely wonderful stay, with a wonderful host. Kent goes to great lengths to make sure that your stay on the island is as relaxing as possible, and can take care of anything we needed.<br/>When we ran out of gas for our grill, Kent showed up at our dock on a jet ski within 10 minutes with a fresh tank! Whether it's extra fresh water, or extra fresh linens, or extra cooler ice, anything we wanted or needed was taken care of quicker than most hotels.

Elisa July 10 2023
Rating: 5.0 / 5

Such a memorable experience! Not often you find such a peaceful and tranquil setting to spend your birthday in! Loved the kayaks, going to bed and waking up with all of the windows and Loons was such a highlight!!

Lisa July 09 2023
Rating: 5.0 / 5

My partner, kids and I loved our stay on the floating house, and at the island in general. It was such a beautiful, unique spot with a fun mix of camping-ish experiences and the ease of staying in a home. Kent and Heather were incredibly helpful and made our stay comfortable. Grateful to have found this amazing spot!

Gregory D. July 01 2023
Peaceful
Rating: 5.0 / 5

The property was cute and peaceful. It was everything we were looking for to get away from our busy life. Kent was very attentive to every one of our needs and was great with communication. Definitely planning a return trip

Lauren June 28 2023
Rating: 5.0 / 5

Absolutely incredible from arrival to departure. Kent does an incredible job making the island comfy for guests and his care for the island really shows. If you have an opportunity to stay in this beautiful space, do so! Couldn’t have asked for something lovelier.

Abraham June 23 2023
Rating: 5.0 / 5

I can’t speak highly enough of my stay at the Nautilus and 1BSI. Getting onto the island was easy and convenient with all kinds of canoes, kayaks, paddles, and life jackets ready for me at the dock. The 30 minute paddle to the island was beautiful! The floating cabin was lovely and the view out the picture windows at sunrise was breathtaking. A quick walk to the west side for sundown in the evening was just as great! Kent and Heather were so friendly, helpful, and laid back. I did a lot of cooking over the fire and my pup had an amazing week. We will definitely be back!

Chris June 19 2023
Rating: 5.0 / 5

You will find what you are looking for here!

Cameron June 18 2023
Rating: 5.0 / 5

Kent is the man. Wildly cool place, can’t wait to go back.

ErikaL January 01 2018
Perfect honeymoon
Rating: 5.0 / 5

My husband and I decided to honeymoon to this lovely get-away in Maine and it did NOT disappoint!! We stayed in the new Nautilus Floating House and it was a dream to wake up to breathtaking views from our bed every morning. Hiking, swimming, and canoeing filled our day with fun. Kent and Heather were amazing hosts that made sure our stay was top notch. If you’re looking for a peaceful, beautiful, vacation, you’ve found it!!

Nautilus Water House FAQs

What's special about the Nautilus Waterhouse?

The Nautilus is a floating waterhouse docked at the island - offering a unique on-the-water stay with stunning lake views and immediate access to swimming and paddling.

Is the Nautilus Waterhouse off-grid?

Yes. Like all 1BSI stays, the Nautilus is off-grid by design, using thoughtful systems that balance sustainability with comfort.

What's included in this stay?

A cozy sleeping space, cooking gear, hot shower/bathroom access on the island, firewood, canoe or kayak use, and access to a hammock swim dock, boat dock, and swimming spots.

How do I access the Nautilus Waterhouse?

You'll arrive on your front porch by boat.