The Cushwa Basin Visitor Center in Williamsport is located at mile 99.8 along the C&O Canal towpath in Washington County, MD. Situated at the confluence of the Conococheague Creek and the Potomac River, Williamsport was first settled in 1740. A half-mile rewatered section of canal leads through the turning basin, under the only railroad lift bridge on the canal, and continues to Lockhouse 44 and the adjacent lock. The Conocheague Aqueduct is located across from the turning basin.