 Beginning in the 1950s Stumphouse tunnel was used by Clemson University to grow blue cheese until the 1970s when the blue cheese operation was relocated to air-conditioned cheese ripening rooms where the tunnel environment was duplicated.Today, Stumphouse tunnel is operated as a public park along with nearby Isaqueena Falls by the city of Walhalla.It is open daily except Christmas Day and during inclement weather from 10am until 5pm.