Photo: National Park Service Digital Image Archives, Public domain Free places to visit in Concord, Massachusetts
Photo: National Park Service Digital Image Archives, Public domain
Photo: Seasider53, CC BY-SA 4.0 Battle Road Trail
Free, always
Photo: Photo by Wikipedia user Bikeable, CC BY-SA 2.5 Sleepy Hollow Cemetery
Free, always
Photo: Erik Granlund, CC BY-SA 4.0 Walden Pond
Free, always
Photo: Unknown authorUnknown author, Public domain