pebbles installed in a park to be used as foot therapy

abstract architecture art asphalt backdrop background block boulder brown cat closeup cobblestone concept construction decorative design fashion floor flooring food foot geology geometric geometry granite graphic gravel gray grid installed iron material mesh modern mosaic natural nature orange ornament park pattern patterns pebble pebbles print repeat rock rough rubble sand snow soil spot stone stonewall structure symmetry textile texture textured therapy tile used wall wallpaper white wild wildlife wood zoo