30 mi from Cushing, Acadia National Park leads the list

Acadia National Park: Plh1234us, CC BY-SA 3.0 · Portland Head Light: Aniarku, CC BY-SA 3.0 · Cadillac Mountain: The original uploader was NightThree at English Wikipedia., CC BY 2.0 · Fort Knox: Unknown, Public domain · Fort Gorges: Dirk Ingo Franke, CC BY 3.0 · Pemaquid Point Light: WestportWiki, CC BY-SA 3.0 · Bass Harbor Head Light: G. Edward Johnson, CC BY-SA 3.0 · Maine Narrow Gauge Railroad Museum: No machine-readable author provided. Gwernol assumed (based on copyright claims), CC BY-SA 3.0 · Portland Museum of Art: John Phelan, CC BY 3.0 · Coastal Maine Botanical Gardens: CMBG editor, CC BY-SA 4.0 · Farnsworth Art Museum: Panoramio user MementoMori, CC BY 3.0 · Frances Perkins National Monument: Robert Reed, NPS employee (per the same source), Public domain · Maine Maritime Museum: Maine Maritime Museum, CC BY 3.0 · Maine State Museum: Stilfehler, CC BY-SA 3.0 · Bowdoin College Museum of Art: Charles Follen McKim. Uploaded 28 September 2005 to en:Wikipedia by Hugh Manate, Public domain · Joshua L. Chamberlain Museum: Reroche at English Wikipedia, Public domain · Monument Square: Needsmoreritalin, CC BY-SA 4.0 · Colby College Museum of Art: Colby Mariam, CC BY-SA 4.0 · Abbe Museum: AbbeMuseum, CC BY-SA 4.0 · Peary–MacMillan Arctic Museum: Tndou, CC BY-SA 3.0 · Western Promenade: Namiba, CC BY-SA 3.0 · Bates College Museum of Art: Xin Deui, CC BY-SA 4.0 · L. C. Bates Museum: W.A. Judge, Public domain · Penobscot Marine Museum: John Smith, Public domain · Viles Arboretum: eddie welker from Laurel, MD, USA, CC BY-SA 2.0 · Wiscasset Jail and Museum: Unknown authorUnknown author, Public domain · Children's Museum of Maine: Kitetails, CC BY-SA 3.0 · Farnsworth Homestead: Unknown, Public domain · Payson Park: Daderot, Public domain · Redington Museum: Magicpiano, CC BY-SA 4.0 · Islesford Historical Museum and Blue Duck Ships Store: Thomson M, CC BY 3.0 · Museum of African Culture: John Phelan, CC BY-SA 4.0