Farallon Islands off the coast of San Francisco, California

From Wikipedia:

The Farallon Islands, or Farallones, are a group of islands and rocks found in the Gulf of the Farallones, off the coast of San Francisco, California, USA. They lie 27 miles (43 km) outside the Golden Gate and 20 miles (32 km) south of Point Reyes. They are visible from the mainland on clear days. The islands are officially part of the City and County of San Francisco, California.

This is the link to the website of Farallones Marine Sanctuary Association.

Image source: Aulon Island, Arch Rock, Sugarloaf, off the Farallon Islands, California. Taken by Duncan Wright. GNU Free Documentation License.