Anyone can cover the entire outside of their house with shells. After all, they won’t be the ones looking at it most of the time. But to cover the inside as well - that’s how you prove you truly love the style.
In Montoro, Spain, the residents seem to go a bit above and beyond the call of decoration. Unsatisfied with the typical segregation of interior vs. exterior home design, industrious residents like owners of the Shell House have plastered the entire inside and outside of their homes with shells.