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

Jose November 05 2023
Rating: 5.0 / 5

Great place to relax escape the city so peaceful nice sky during the night

Cierra November 04 2023
Rating: 5.0 / 5

The nautilus and stay at the island was magical and Kent was very helpful! The peace and privacy of the island in the off season was a perfect get away! We loved that the island and house was dog friendly as well, will definitely try to visit again!

Tracey October 29 2023
Rating: 5.0 / 5

We had a wonderful and relaxing weekend at One big sustainable island. The nautilus is amazing, Kent and crew thought of everything , right down to coffee and tea. Leave your portable chargers at home. Solar lights indoors were a huge surprise. The stove kept the place warm and toasty overnight. The island and wildlife are beautiful. We will be back for sure!

Michelle October 22 2023
Rating: 5.0 / 5

Kent is the ultimate host! Staying at 1BSI with rainy fall weather was just perfect. It was a warm 60°F. Between the accommodations and the communication, everything just exceeded our e of expectations. We feel so lucky to have found Kent and his island. It was very dog friendly as well. Plan your meals accordingly but if you plan it right you can really cook some nice dinners! Can’t wait to be back! Thank you so much. Kent is the best!!

Jens October 18 2023
Rating: 5.0 / 5

The Waterhouse at one big sustainable island is a magical place I can’t recommend enough. <br/>We visit in peak autumn, so the colors on the leaves was so beautiful and the views off the lake fantastic. Kent is a great host - super friendly, fun and flexible.<br/>All around a five star experience!

Josh October 16 2023
Rating: 5.0 / 5

The island was truly an epic experience. We loved staying at the Nautilus. Right on the water, lapping against the shore and the rain on the metal roof. It was truly such a peaceful and relaxing experience. Wish we could have stayed longer. The island has plenty of space to keep everything private. Had amazing views for sunrise n sunset. We saw several bald eagles which was beautiful. Thank you.

David October 12 2023
Rating: 5.0 / 5

This was a peak experience! We explored the island, foraged for wild mushrooms, had our own private canoe, and swam in the cool lake water. We felt like kids again, able to play all day and watch the shooting starts at night, while listening to the ethereal sounds of the loons. Kent has done an amazing job creating a sustainable island paradise. We can't wait to return!

Sami October 09 2023
Rating: 5.0 / 5

Kent and Heather were incredible hosts! Could not have been happier with the place, incredible views and sunrise/sunset. <br/>Everything was planned very well and it is very clear that a lot of thought has gone into every part of the stay. Already planning my next visit!<br/>Thank you!

Kylee October 04 2023
Rating: 5.0 / 5

Best Airbnb selection yet! Very dog friendly!! If you’re even thinking about staying here DO IT. We had a ton of fun on the lake and exploring the island. Absolutely amazing stay, with the friendliest hosts in Maine!! We’ll definitely be doing this again next year.

Audrey October 02 2023
Rating: 5.0 / 5

Put this stay on your Maine wish list IMMEDIATELY! The Nautilus site is unreal- 360 views of the lake and sunrise, a front seat to the epic moon rise in the evening, swim right off your floating front porch, walk the small island or kayak/canoe further out. We had two nights of absolute bliss and quiet. Can’t wait to go back in the spring! Thank you Kent, Bella, Milo, and Sky!

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.