Wikipedia
A naviforme (initially, navetiforme) was a prehistoric boat-shaped house built on the Balearic Islands of Spain. The hut-like buildings date to the Early Bronze Age or the Pretalayotic Period (ca. 3400-1700 B.C.). The building was generally large and had strong walls. It had dual functions for productive activities and living spaces. Examples of Naviformes are found in various villages but good examples have been excavated at Boquez, Sa Vall, and Son Mercer de Baix.
The word naviforme originated from the building's resemblance to another prehistoric Minorcan structure, the naveta. Given the resemblance in their construction, the naviform was initially called a "navetiforme", a form of a "neveta", though, over time, the word was simplified to naviforme. When few are found together, it is difficult to distinguish between them, despite the naviforme being a home and the naveta being a tomb. Researchers believe that an extended family averaging 20 people could live in a naviforme.