arid barrel barrel cactus Cacti cactus clumps clusters coloring colors colouring colours compact covered echinocactus globose globular perennial pointed points pronounced ribs protective pups ribs round shape shaped sharp skin soft-wooded perennial spikes spination spines spiny surface symmetrical symmetry thick tough skin to-the-point ancient cobblestone Denmark geese goose historical home house old road street town cooperage fort Frontier heritage keg pioneer prairie product rustic shed store vat village wilderness winery wood wooden asphalt build building bulldozer construction digger excavator lay machines roller steam work danger defence defense ornamental plant Prickly xerophyte Arizona cacto desert kaktus organic rib southwest spine texture thorn thorns vegetation western ball cluster garden globe group plants prickles Spain spanish sphere spikey spiky three trio groups shade sunlight trees