Opened in 2006, the National Canal Museum is the only museum in the country dedicated to the history of canals, which for a long time were an essential mode of transport before the onset of railroads and automobiles. It is located in the Elaine and Peter Emrick Technology center, which is also home to the Delaware & Lehigh National Heritage Corridor. The museum features interactive and hands-on exhibits that help visitors understand the science, technology and navigation of canals as well as the daily life and related industries that surrounded them. The museum is in charge of maintaining the three operating canal locks, a locktender's house, the ruins of three industrial areas, and the Change Bridge—one of the first suspension bridges built in the country. Visitors can also take short mule-drawn canal boat rides. The museum also has a research library and archives, containing thousands of artifacts, documents and other materials.