Frederick Law Olmsted is one of those names that trivia questions are built around. He was one of the designers behind such public spaces as Central Park, Prospect Park, and Niagara Falls (the other being – pop quiz! – Calvert Vaux), and was a great journalist and philosopher of his time. So it was with great intrigue that I previewed an art exhibition at Open Source Gallery inspired by the man. In addition to such usual fare as plays, film, music performances, and murals, it attempts to build a park inside the South Slope gallery.