It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
GGB and Albany Wetlands. View of Golden Gate Bridge and San Francisco Bay from west side of Albany Hill Photo Taken in September en Ronhjones Fpwong at en other versions Fpwong Original upload log page en GGBandAlbanyWetlands Upload date User Bytes Dimensions Comment UTC Fpwong bytes no of Golden Gate Bridge and San Francisco
Page 2017 Free-images.com. All images are Public Domain