Photo: David Dugan, CC BY-SA 3.0 Free historic sites in Gettysburg
Photo: David Dugan, CC BY-SA 3.0 
Photo: The National Guard, Public domain Little Round Top
Free, always
Photo: Alfred Waud. A list of artists and engravers can be found on p. 23 of the PDF., Public domain Devil’s Den
Free, always
Photo: Photo: Henryhartley at en.wikipedia Statue: Randolph Rogers (1825-1892), Public domain Soldiers’ National Cemetery
Free, always
Photo: See below, CC BY-SA 3.0 High Water Mark
Free, always
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 Eternal Light Peace Memorial
Free, alwaysGettysburg College campus
Free, always
Photo: Edwin Forbes, Public domain