Cornwell Avenue Park 725 Cornwell Ave, West Hempstead, NY11552 The Cornwell Avenue Park is a small recreational space that features playgrounds, swings, walking paths and park…More benches. No ball playing or pets are permitted in the park. The space is owned by the Town of Hempstead, but active community groups can help keep the park clean and beautiful by participating in the Adopt-A-Town-Park program. To learn more, call (516) 292-9000 ext. 266.