Irish photographer and skateboarder Richard Gilligan spent four years traveling through Europe and the US to photograph homemade skateparks. The resulting photographs are not your run-of-the-mill action shots filled with miraculous body moves, slashes, twists, and turns. Instead, Gilligan chooses to focus on the sport's "negative space." The out-of-the-way concrete embankments; nondescript suburban lots where kids come to practice; a simple wooden ramp so insubstantial that no one but a skateboarder would recognise its use.