This is the Hillebachsee. Experience the bathing beach! m Hochheide village Niedersfeld you will experience long sunny days. NRW's highest dam invites you to water fun in the middle of Winterberg's mountain world. Sun-seekers, swimmers and surfers love the secluded bathing bay. The Hillebachsee recreational area is family and child friendly. Kids splash around in the shallow waters of the shore or let off steam in the playground. Active people look forward to water skiing, miniature golf, beach volleyball and soccer courts, inline skating or cycling.