Lava Beds National Monument – CA. (NPS photo)Lincoln Memorial – DC. (NPS photo)Little Bighorn Battlefield National Monument – MT. (NPS photo)Longfellow House-Washington’s Headquarters National Historic Site – MA. (NPS photo)Lowell National Historical Park – MA. (NPS photo)“Texas White House,” Lyndon B. Johnson National Historical Park – TX. (NPS photo)
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Marsh-Billings-Rockefeller National Historical Park – VT. (NPS photo)Martin Luther King Jr. National Historic Site – GA. (NPS image)Martin Van Buren National Historic Site – NY. (NPS photo)Mary McLeod Bethune Council House National Historic Site – DC. (NPS photo)Minute Man National Historical Park – MA. (NPS photo)Mississippi National River and Recreation Area – MN. (NPS photo)Missouri National Recreational River – NB, SD. (NPS photo)Montezuma Castle National Monument – AZ. (NPS photo)Morristown National Historical Park – NJ. (NPS photo)Mount Rainier National Park – WA. (NPS photo)Mount Rushmore National Memorial – SD. (NPS photo)Muir Woods National Monument – CA. (NPS photo)
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