When Kitty Mrache and her husband Michael listed a pentagonal cabin that a friend built on their property on Airbnb in 2009, the couple had little clue that their listing would completely transform their lives. The rental—dubbed the “Mushroom Dome Cabin”—exploded in popularity, and it has held the title as Airbnb’s most popular listing for ten years and counting.

Flush with five-star ratings and nearly 1,300 reviews, the Mushroom Dome Cabin is also one of the hardest Airbnbs to book, thanks to its affordable price and stellar treetop location that’s perfectly positioned for bird watching and views of the Milky Way. Guests typically book months in advance; snagging dates on a weekend often require making a request nine to eleven months in advance.

Although the couple have spruced up the cabin and slightly expanded it beyond its original 100-square-foot size, the dwelling hasn’t lost its rustic charm. A true nature retreat, the elevated tree house-like home comes with a large outdoor deck and is surrounded by hiking trails. The geodesic dome has glazed sections that open the cabin up to natural light and canopy views.

The one-bedroom, one-bath rental comfortably accommodates three guests with a queen-sized mattress in the loft and a couch on the main floor that can be converted to a bed. The bathroom includes a Nature’s Head composting toilet and a tiled shower.

The Mraches have also opened a second rental, Hummingbird Haven, a cozy studio space in the forest surrounded by hundreds of hummingbirds.

The World’s Most Popular Airbnb Is a Geodesic Cabin in California