dresden, historic center, historical
petra, king wall, jordan
petra, jordan, treasure house
canyon, tower, landscape
triskele, stone drawing, rock
obernkirchen sandstone, quarry, bückeberg
head, stone head, stone face
mexico, chiapas, agua azul
fossil, sandstone, ancient
canyon, arizona, sandstone
valley of fire, nature, sandstone
antelope canyon, page, sandstone
egypt, edfu, temple
bryce canyon, utah, winter
red rock canyon, las vegas, nevada
ulm minster, muenster, architecture
church, wall, passage