Cape Romano Dome House, Residential structure near Cape Romano, United States.

The Cape Romano Dome House was six interconnected white-painted concrete domes on short pilings, built as a 2,400-square-foot home with three bedrooms and three bathrooms. Some modules had two levels, and arched openings and small rectangular windows were cut into the walls. Only pilings remain above the water after the last domes collapsed in 2022.

Bob Lee built the residence in 1982 on Morgan Island following years of planning and land acquisition. Erosion and hurricanes gradually moved the domes farther into the sea over decades until Hurricane Ian submerged them completely in 2022.

Bob Lee's daughter Jane Maples recalled that neighbours on Marco Island joked the domes were guarded with machine guns, giving the house a reputation as a scary place. The family lived there until 1992, when Hurricane Andrew wrecked the interior but barely scratched the concrete shells.

The remains lie in open water and can only be reached by boat since there is no bridge or land connection. Waves and tides affect visibility of the domes depending on weather and water levels.

Bob Lee built a full-scale model of the house on land he owned in Gatlinburg, Tennessee, before erecting the Cape Romano version; that Tennessee dome house still stands. The concrete for the walls was mixed with sand taken from the island itself.