We designed and built the pool on the first phase. They clients were spending so much time at the pool level, they asked us to design and install a more useable space beneath their deck and porch. So we added the arched stacked stone columns, built in kitchen and lving space. It also has an undercover system, which directs water into a hidden drain. Also note the channel drain along the base of the columns. Mark Schisler, Legacy Landscapes, Inc.