To get publicity for its new logo and redesigned rooms, Holiday Inn hired world record-holding cardstacker Bryan Berg to build a 400 square foot Key Card Hotel that is on display at the South Street Seaport in Manhattan. It features a bedroom, bathroom and lobby all made out of key cards. More than 200,000 cards were used and it weighs 4,000 pounds. And yes you can sit on the furniture. (Courtesy Holiday Inn)