The New World Mall located in Bangkok, Thailand has been abandoned since 1997. It was forced to close because of building violations. Then in 1999 a fire destroyed the building’s roof, which causes the basement of the structure to flood with rainwater. The standing water in the empty shopping center quickly became a breeding ground for mosquitoes. As a way to combat the pests, locals introduced koi fish to the murky waters. Not only did the fish take care of the bugs, but they took on a life of their own. The result is a now unique, thriving, urban fish habitat where no one expected it.