Keene is an unincorporated community in Albemarle County, Virginia, United States. As of the 1990 census, the town had a total population of 10.The town is known for being the location of the last sighting of a passenger pigeon in the wild, by Theodore Roosevelt. Roosevelt had "the first Camp David", called Pine Knot, here from 1905.Christ Church Glendower, Plain Dealing, and The Rectory are listed on the National Register of Historic Places.