via Atlas Obscura:
The Futuro House was designed by Finnish architect Matti Suuronen in the late 1960s. Made of new materials like plastic and manufactured to be portable and adaptable to diverse terrain with its raised legs, the capsule house was imagined as a ski chalet with a quick heating system. You entered through a hatch to an elliptical space with a bedroom, bathroom, fireplace, and living room. Suuronen soon saw its potential beyond the slopes, and through the Futuro Corporation built the lightweight houses as a prefabricated, compact housing solution adaptable for any corner of the globe.