Casa Solaris Architect John Hix who worked under Louis Kahn, designed the hotel Hix Island House in Vieques, off Puerto Rico. The latest Guest House is called Casa Solaris and is entirely removed from the commercial grid, running completely on solar power. Like the other buildings Casa Solaris is designed to take advantage of the trade winds that flow through the Vieques hills. By placing the open wall toward the trade winds to the East the room is constantly cooled. From a visual standpoint it is quite different from the Mediterranean influenced, stucco walls of most Caribbean resorts. It's build of block and reinforced concrete which makes for an interesting contrast to the lush surroundings of the island, and it stands up to extreme weather and hurricane force gales.