German artist HA Schulte designed the Save the Beach hotel, which was made entirely of garbage and other debris collected on beaches. The Corona beer company commissioned the hotel as part of its Save the Beach campaign, which is the beer maker's effort to reduce garbage and pollution of Europe's beaches. The five-room hotel was open for four days on Rome's Castel Sant'Angelo and accepted visitors like supermodel Helen Christensen through a competitive process. (Save The Beach )