National World War II Memorial

The primary source

Antietam National Battlefield (1862): Historic Monuments for Grades 4-8 (Historic Monuments)

Gettysburg National Military Park (1863): Historic Monuments for Grades 4-8 (Historic Monuments)

Fort Knox Bullion Depository

Boston's Trail to Freedom

Mount Rushmore

Liberty Bell (Historic Monuments) (Historic Monuments)

Vietnam Veteran's Memorial

Franklin Delano Roosevelt Memorial (Historic Monuments) (Historic Monuments)

Marine Corps Memorial (Historic Monuments) (Historic Monuments)