Founded in 1990, the Glenn L. Martin Maryland Aviation Museum is a private, nonprofit corporation. The Museum's purpose is to maintain an educational institution dedicated to the promotion, preservation, and documentation of aviation and space history in Maryland—namely, the contributions of Glenn L. Martin and his successful company. On display are many items of Maryland historical significance, including industrial models of aircraft and rockets, wind tunnel models, restored and partly-restored aircraft, and many original photographs outlining the growth of the Martin Company. An effort has been made to chronologically depict this growth from its beginnings in Santa Ana, California, to its current standing as the Lockheed Martin Corporation. The Museum also spotlights aviation history in Maryland. Unknown to most, the United State's earliest manned flight took place in Maryland.

The museum offers exhibits, tours, and lectures.

Created by Congress in 1996, the Rivers of Steel National Heritage Area is committed to preserving, interpreting, and managing the historic, cultural, and natural resources related to Big Steel and its related industries. Encompassing over 5,000 square miles in the seven counties of Allegheny, Armstrong, Beaver, Westmoreland, Greene, Fayette, and Washington, Rivers of Steel is building on this area's remarkable transition from heavy industry to high technology and diversified services as well as bolstering the new regional economy by promoting tourism and economic development based on this region's historic industrial saga.

A multifaceted program, the Rivers of Steel National Heritage Area's mission includes: historic preservation, cultural conservation, education, recreation, and resource development. Currently, the Heritage Area has bills in Congress to create the Homestead Works National Park. The proposed park would be located on 38 acres surrounding the Carrie Furnaces, the last of the giant blast furnaces from the Homestead Works, and the Pump House, site of the bloody 1892 Homestead Steel Strike.

River of Steel also maintains the Bost Building, an 1892 hotel, in which it presents exhibits.

The Bost Building offers exhibits and educational programs.

Located in the LeMoyne House in Washington, Pennsylvania, the WCHS provides many programs, activities, and services to individuals and groups in the tri-state area. The LeMoyne House is Pennsylvania's first National Historic Landmark of the Underground Railroad. Built in 1812 by John Julius LeMoyne, the house became part of the Underground Railroad under his son, Francis Julius LeMoyne. The society also oversees the LeMoyne Crematory, the first crematory in the United States.

The house offers tours, exhibits, and access to a research library; the crematory offers tours; and the society offers lectures, workshops, conferences, and other educational programs.

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 Caldwell County Historical Railroad Society presents railway history via a museum. Artifacts include model trains, railroad nails and equipment, signals, engine controls, and a restored ICRR caboose.

The museum offers exhibits.

The Trust maintains the historic Sehner-Ellicott-von Hess House. This was the very building where Captain Meriwether Lewis trained with nationally renowned surveyor, Andrew Ellicott, on those navigational skills vital to the success of the famed Lewis and Clark Expedition and now serves as the headquarters of the Trust. Visitors are welcome to tour this finely restored example of Georgian architecture and its exhibits outlining the story of its restoration and most famous inhabitant, Andrew Ellicott.

The house offers exhibits and tours.

The Great Harbor Maritime Museum presents the local maritime history of the Mount Desert Island area.

The museum offers exhibits.

The Society's Museum focuses on exhibits exploring Folsom's native people; the discovery of gold and the formation of mining camps; ethnic groups who contributed to this area; the formation of the town and the growth and establishment of the railroad, prison, and powerhouse; and later efforts at gold mining. The Museum's Pioneer Living History Center allows visitors a look at Folsom's past through vehicles; machines; equipment; and replicas of a miner's shack, blacksmith shop, carriage shed, and more.

The society offers educational and recreational events; the museum offers exhibits, tours, and educational programs.