The Great Falls Tavern (also historically known as the Crommelin House) originally functioned as one of the many lockhouses along the canal and serviced thousands of cargo and excursion boats that passed through Lock 20 on the way to and from Cumberland, MD and Georgetown in Washington, DC. Today the Great Falls Tavern remains a hub of activity as it acts as one of C&O Canal National Historical Park's visitor centers. Here, visitors can get information about the park's programs, hiking trails, and history.
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.