The National Register of Historic Places contains more than 85,000 sites, but only some 2,500 of them have been listed as National Historic Landmarks. New England is home to hundreds of these particularly significant structures, objects and places.
Above:
The Great Seal of the State of Maine
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| MAINE Portland Observatory, Portland
This 1807 tower is the oldest maritime signal tower in the United States; it sent and received signals to and from ships entering Portland Harbor.
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