In 1923 Earl Douglass wrote to the Smithsonian Institute, “I hope that the Government, for the benefit of science and the people, will uncover a large area, leave the bones and skeletons in relief and house them in. It would make one of the most astounding and instructive sights imaginable.”

Over 500 sets of dinosaur bones have been removed and the rest left for everyone to see in situ – stunning palaeontology.

Swelter shelter petroglyphs