Another exhibit from the Pitt Rivers Museum in Oxford. I like this map a lot – it is described by the card shown above – because it concentrates on condition more than physical characteristics. It is also made so that it floats if dropped into the sea from the small fishing boats that used such maps. It is photographed through glass so there are a lot of reflections.
To resolve pairs into 3D images go cross -eyed so that the same prominent feature in each image is registered over each other. Try to relax so that the full 3D depth becomes apparent. You will see three images as you go cross-eyed. Concentrate on the middle image.