These are probably not maps you initially would find interesting, but click on them for greater details. They’re fascinating.
![Map of the city of Washington showing the location of the sewers in 1885](https://ghostsofdc.org/wp-content/uploads/sites/7/2015/10/ct004790.jpg)
Source: Library of Congress
![Map of the city of Washington showing the location of the water mains in 1885](https://ghostsofdc.org/wp-content/uploads/sites/7/2015/10/ct004783.jpg)
Source: Library of Congress
These are probably not maps you initially would find interesting, but click on them for greater details. They’re fascinating.
Source: Library of Congress
Source: Library of Congress