South Korean artist and designer Choi Jeong-Hwa used 1,000 old doors to create an unusual ten-storey door building in South Korea. This colorful public art installation titled “Doors” was built in Soeul back in 2009 and I'm pretty sure it holds the record for the most doors in a single building. The building looks really cool, however I would be scared navigating inside it – one wrong door and you're flying.