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San Juan National Historic Site was created on 1949-02-14.
Steamtown National Historic Site was created in 1995.
Christiansted National Historic Site was created on 1952-03-04.
Eugene O'Neill National Historic Site was created in 1971.
The area of Christiansted National Historic Site is 109,872.15186816 square meters.
Saint-Gaudens National Historic Site was created in 1977.
The area of Steamtown National Historic Site is 252,847.589271552 square meters.
Fort Larned National Historic Site was created in 1964.
John Muir National Historic Site was created in 1962.
Chicago Portage National Historic Site was created in 1952.
Hampton National Historic Site was created on 1948-06-22.
Friendship Hill National Historic Site was created in 1789.