The following DNA bridge was built in Singapore. It was built in the shape of a double helix. It won first place in the category of transportation at the festival of architecture in Barcelona. Helix Bridge is really just a footbridge. The bridge consists of a spirals similar to those that make up the DNA of living organisms. This design uses significantly less steel than conventional cantilever bridges. 280 meters long bridge was opened July 18, 2010 year.