View Comments Construction progress was unveiled Friday morning at the Spooky Nook Sports Complex, as the developer of the project gave a behind the scenes tour to show off the 1.3 million-square-foot facility. The city of Hamilton is partnering with Spooky Nook Sports, the largest indoor sports complex in the country near Lancaster, Pennsylvania, to redevelop the former Champion Paper Mill property, a 40-plus-acre brownfield site on the Great Miami riverfront. Hamilton city officials and and the developer say significant progress has been made on the Spooky Nook projects, Mill 1 (athletic side) and Mill 2 (hotel/conference center). Spooky Nook is one of the biggest development projects in the Cincinnati region, with an approximate price tag of $150 million to build, and an expected draw of one million visitors annually.