Photo: See below, CC BY-SA 3.0 Free landmarks in Gettysburg
Photo: See below, CC BY-SA 3.0 
Photo: Bubba73, CC BY-SA 3.0 Lincoln Square
Free, alwaysDavid Wills House
Free outside, paid inside
Photo: Memorial:architect Paul Philippe Cret (1876-1945), sculptor Lee Oscar Lawrie (1877-1963).[1] Photo: User:Accurizer, Public domain