Revolver & Centaur

"During the late 18th and early 19th centuries, well-heeled European travelers toured the countryside looking for views that would be as pretty as a picture — or, to be more precise, as pretty as a painting. And because they had a certain kind of painting in mind as embodying their standard of natural beauty, these early ecotourists often carried with them a small, convex, tinted mirror known as a “Claude glass,” after the 17th-century landscape painter Claude Lorrain. When a picturesque landscape was encountered — say, the snow-capped Alps — the tourists would turn their backs to the mountains and whip out their Claude glass, holding it up to frame the mountains, which were not only reflected but also color-shifted to a tonal range that made them appear more painterly."

(Source: places.designobserver.com)