Bees and their hive in a tree at Glen Canyon Park in San Francisco.

Pair of humpback whales just off the Golden Gate Bridge.

Updated 2017-08-09 17:14:

More whales and some porpoises.

Panoramic photo of the full extent of Golden Gate Park as seen from Grand View Park in San Francisco.

Dramatic clouds over the Farallon Islands in the Pacific just off San Francisco.

Bayview Rise is a large work of art created by Laura Haddad and Tom Drugan installed at Port Pier 92 in the Bayview district of San Francisco.

Photo of San Francisco seen through some rocks on Mount Davidson.

Photos of gray whales at Waddell Beach in California.

Updated 2015-11-21 13:26:

Updated 2015-11-23 15:50:

Photos of plaques in The Presidio of San Francisco.

Photo of downtown San Francisco seen through a crack in the rocks at Corona Heights Park.