The Thimble Stones, millstone grit boulders near the summit of Ilkley Moor, West Yorkshire, England, United Kingdom, Europe

thimble stones stone rock boulder geology millstone grit weathering erosion sedimentary ilkley yorkshire moor moorland day outdoors landscape landscapes scenics moors nature natural world topography eroded physical geography surface processes rocks boulders rock formation rock formations stones ilkley moor england united kingdom europe great britain photography color image horizontal travel destination