Baltimore Public Works Museum

(Wikipedia) - The Baltimore Public Works Museum, located at 751 Eastern Avenue, Pier 7 of the Inner Harbor, Baltimore, Maryland, provides a behind-the-scenes glimpse of how a large city provides utility services to its citizens.
The building housing this display is an operating pumping station built in 1912. Exhibits also explain street lighting, road maintenance and trash removal. An outdoor sculpture called Streetscape is an intricate model of a network of phone lines, street lights, storm drains and pipes for water, gas and sewage disposal.
Link to museum's site.

Mmmm public works!