The remote northeastern peninsula of Furillen, on the island of Gotland, is about as far as one can go in Sweden before the Baltic gives way to Eastern Europe. Once the site of military radar stations and active limestone quarries, Furillen’s rugged landscape now attracts artists and vacationers.

One of the peninsula’s newest converts, Mikael Blomqvist, wanted to build an inspiring retreat here for artists, architects, and others to borrow or rent. The entrepreneur and art collector enlisted Andreas Forsberg, of the Swedish architecture firm AQ Arkitekter, to design a 65-foot cube sheathed in glass and Cor-Ten steel hydraulic panels that can close up around the house to form a bunker or be lowered to create terraces. The two-story house—bedrooms and a wine cellar are in the basement level—includes a library and spaces for meetings.