River rocks like these can be used for landscaping in dry climate; they also make a nice border between a sidewalk and city street.

- Image ID: RFMWK1
River rocks like these can be used for landscaping in dry climate; they also make a nice border between a sidewalk and city street.
Michael Lingberg / Alamy Stock Photo
Image ID: RFMWK1
Location: Gerstle Park, San Rafael, CA