Photo 1229Photograph detailThree slivers of light peek through the boardwalk onto the crusted and cracked salt mud.LocationAlviso Salt Marshes, Don Edward San Francisco Bay National Wildlife RefugeTaken2010-08-16 10:38:52CategoriesLandscapesMacroTexturesDimensions3072 × 2048 pixelsHigh-resolution downloadLicenseCreative Commons Attribution 3.0 United States License