see more of Gadl’s images – they are incredible!
Equirectangular panorama built from 8 pictures (EXIF data from the first one). See also its stereographic and oblique mercator projections.
La caverne aux livres is a secondhand bookshop in Auvers-sur-Oise (30km to the North of Paris). The entrance of the bookshop is an ancient railway hangar, but from there you’ll quickly find yourself in an old postal train whose cars have been reconverted into giant bookshelves.