In one of Maryland's first state parks (1907), the valley and its natural resources have been enjoyed by the Native Americans, explorers, settlers, and present-day citizens. With its source in Frederick and Carroll counties, the Patapsco serves the Port of Baltimore, and empties into the Chesapeake Bay. The Avalon Visitor Center houses exhibits spanning over 300 years of history along the Patapsco River. Housed in a 19th-century stone dwelling in the Avalon Area, the center includes a recreation of a 1930s forest warden's office. The park contains several historic sites, including the Baltimore and Ohio Railroad, the Thomas Viaduct, remains of the Orange Grove Mill, the Avalon Iron and Nail Works, and Bloedes Dam.

The park offers exhibits and tours.

With three permanent collections and a membership in the Smithsonian Affiliations Program, the Museum offers a wide range of exhibits, including a glimpse into the daily lives of soldiers during the Civil War; a reproduction of a turn-of-the-century locomotive factory; and an exciting depiction of the Civil War's Great Locomotive Chase.

The museum offers exhibits, tours, lectures, workshops, and other educational and recreational programs.

The Museum seeks to preserve and share with the public the history of railroading, particularly Texas railroading, as it has been and as it is now. The museum, open every weekend from April to November, features a collection of railroad locomotives, cars, and other artifacts, as well as a model railroad and a research library.

The museum offers exhibits and research library access.

NORM was founded in 1965 and incorporated in 1976 as a not-for-profit education and historical organization. Its goals are to collect, preserve, restore, operate, and display streetcars and other railway-related equipment. On two miles of the historic Cleveland Southwestern Railway, the museum is working towards its goals to collect, preserve, restore, display, and operate streetcars and other railway equipment for use by the public.

The museums offers tours, exhibits, and monthly meetings.

The WSRHS is dedicated to preserving the history of the railroads that helped build the State of Washington, from the Great Northern Railway, Milwaukee Road, to the Northern Pacific, Union Pacific, SP&S Railway, and all the railroads in between. It operates the Washington State Railroads Historical Society Museum.

The museum offers exhibits.

The Youngwood Historical and Railroad Museum is a railway history museum housed within a restored Pennsylvania Railroad station. Sights include a working model train system.

The museum offers exhibits.