In the new issue of Common-Place, Lisa Gordis writes about the modern audiences that appreciate early American books. At the end of her article, Gordis discusses a visit to the "Charlotte Temple" gravesite in New York's Trinity Churchyard. Of course, Charlotte Temple is a fictional character, so she isn't really buried under the stone that bears her name, but somebody (probably) is. During the 19th century, the gravesite attracted a steady stream of devoted pilgrims.
There is a similar monument in Peabody, MA dedicated to Elizabeth Whitman, whose tragic death inspired Hannah Webster Foster to write The Coquette. As far as I know, it attracts very few visitors.