Putnam Historic District - Credit: Wikimedia Commons
Putnam Historic District, located in Zanesville, Ohio, was an important center of Underground Railroad traffic and it home to a number of abolitionists. The district, with private residences and other key buildings important in the fight against slavery, lies between the Pennsylvania Central Railroad, Van Buren Street, and Muskingum River. It became a historic district of the National Register of Historic Places in 1975. Read more on Wikipedia
Source: en.wikipedia.org