The National Preservation Institute (NPI) is a nonprofit organization offering specialized information, continuing education, and professional training to those involved in the management, preservation, and stewardship of our cultural heritage. It offers seminars in historic preservation and cultural resource management and serves a broad spectrum of professionals from both the government and private sectors by providing preservation information, knowledge, and skills to train and guide the stewards of the United States' historic and cultural places.

Preservation organization, not an individual historic site.

Through student/teacher workshops, tours, exhibits, and a variety of educational programs, Landmarks encourages people to notice and appreciate historic buildings, parks, public spaces, bridges, streets, and other assets that make up the city and its neighborhoods and compose the character of the Pittsburgh region. Landmarks works to preserve and restore the area's historical assets and to assist others in doing the same.

The foundation offers courses, tours, and other educational and recreational programs.

Seems to be more a preservation/umbrella organization than individual historical sites.

The Association is dedicated to preserving Great Lakes lighthouses and the history of the people who kept them by developing a new generation of preservationists.

The association offers workshops, cruises, and tours.

Seems to be more a preservation organization than an actual tourable historical site.

Choice: Current Reviews for Academic Libraries is the premier source for reviews of academic books, electronic media, and Internet resources of interest to those in higher education.

The society is located in the old schoolhouse at Millport.

Cannot find a website.

The Historic Preservation Training Center (HPTC) is dedicated to the safe preservation and maintenance of national parks or partner facilities by demonstrating outstanding leadership, delivering quality preservation services, and developing educational courses that fulfill the competency requirements of Service employees in the career fields of Historic Preservation Skills, Risk Management, Maintenance, and Planning, Design, and Construction.

An organization, not a specific historical site.