Morro Bay, Morro Rock, and the City of Morro Bay in San Luis Obispo County, California. Photo by Kjkolb, CC BY 2.5, http://creativecommons.org/licenses/by/2.5, via Wikimedia Commons

Stormwater flows onto street in Annapolis, Maryland. Photo courtesy of Chesapeake Bay Program (stretched), CC BY-NC 2.0, https://creativecommons.org/licenses/by-nc/2.0/, via Flickr

Panorama of the Homer Spit in Homer, Alaska. Photo by Derek Ramsey (Ram-Man), CC BY-SA 2.5, http://creativecommons.org/licenses/by-sa/2.5, via Wikimedia Commons