Photo by Wikipedia user Kmf164.Located in a no-mans land near the Foggy Bottom neighborhood and close to the National Mall at 18th and New York Avenue, the Octagon House was built in 1800 as a home for wealthy plantation owner Colonel John Tayloe III. The house has a fascinating past and wonderful architectural details as it employs an octagon as its primary design feature. The house temporarily became the home to President James Madison…