Delicate Arch, the most photographed at Arches National Park. Arches Avenue, incredible sandstone (Arches National Park). Balanced rock, this is not the Burmese Kyaiktyo, but not so bad (Arches National Park). When the erosion makes rock so warm (Arches National Park). Sedona State Park (Arizona) Canyonlands National Park : the beginning of the story for the Colorado river. Infinite views in 'Islands in the Sky' and the Green River (Canyonlands National Park) Monument Valley : green after spring rain ! Fantomatic Monument Valley Rock-hiking in Canyonlands National Park (The Needles). 'The Needles' (Canyonlands National Park) Red sandstone and white sandstone (Canyonlands National Park)... ... dreaming of sandstones (Canyonlands National Park). A true maze of canyons (Canyonlands National Park). It rarely rains there, except when Nath' is coming (Canyonlands National Park). King Grand Canyon ! Red and Green in the spring... Only sunset reveals its real dimension (Grand Canyon). You cross deserts to go there, but it is still a mountain, where winter can replace summer in just one night (Grand Canyon). Which adds white to the color palette. Bryce Canyon. The Amphitheater. So thin and fragile. Camping in Bryce Canyon in April. Reds, oranges, ocres and whites meet in Bryce Canyon. Horse Shoe Bend on the Colorado river, just before the entrance of Grand Canyon. Moon shine above Lake Powell. Antelope Canyon. A Navajo Sandstone canyon, close to Page. So narrow (between 50 cm and 3 meters wide),  that the sun light only gets in for 45 minutes around midday... Antelope Canyon. Carved by a river flowing only every 4 to 5 years ! Zion National Park and the famous 'Narrows'. 600 meters of red and grey sandstone polished by the Virgin River. And some of the most interesting rock formations one can see. 'Court of the Patriarchs'. Yosemite ? No, Zion !