Our landscape has been shaped by humans over millennia. It still contains many clues to how it was used in the past, giving us insights into ancient cultures and their everyday life. Our summer school uses archaeology and astronomy as a focus for effective out-of-classroom learning experiences. It demonstrates how a field trip can be used to its full potential by utilising ancient monuments as outdoor classrooms. This article shows how such a summer school can be embedded into the secondary curriculum. We provide advice, example activities and locations to visit, and outline the impact this work has had.