Housed in the basement of a Washington D.C. home, the museum closed in 1998, but there may be some possibility of seeing the collection by contacting the creator and curator of the museum, Harry Finley.
Containing over 4000 items related to menstruation, this is the only collection of its kind in the world. If you get a chance to see the museum, be sure to look for the rubber menstrual apron sold by Sears And Roebuck in 1914. It isn't a pretty site.
The collection is currently seeking a permanent home.