Visiting San Francisco, obviously.
Why these three men got up on this horse is lost to history. The where is a little bit easier to find.
The Cliff House (look up in the right corner) was a popular tourist destination. The original burnt in 1907.
For the curious reader, you can read all you ever wanted to know about Sutro's Cliff House here, here, here, here, here, and here.
For curious reader's who would rather watch a video you might be interested in this one by Thomas Edison that depicts the Sutro Baths.
As for the three men. They were probably friends--or brothers--stopping off in town. Perhaps they were heading off to war? Their image, as many other's that depict vintage men in relationships, often are seen to represent gay relationships. They aren't. These images are largely a reminder of earlier times when men had more freedom to express intimacy as part of a friendship.
For more images of vintage men and their relationships (some gay, some straight) visit: Two Men and Their Dog; Adam and Steve in the Garden of Eden: On Intimacy Between Men; A Man and His Dog; The Beasts of West Point; Vintage Men: Innocence Lost | The Photography of William Gedney; It's Only a Paper Moon;Vintage Gay America: Crawford Barton; These Men Are Not Gay | This Is Not A Farmer | Disfarmer; Desire and Difference: Hidden in Plain Sight, Come Make Eyes With Me Under the Anheuser Bush, Hugh Mangum: Itinerant Photographer, Two men, Two Poses; Photos are Not Always What They Seem,Vintage Sailors: An Awkward Realization, Three Men on a Horse, Welkom Bar: Vintage Same Sex Marriage, Pretty in Pink: Two Vintage Chinese Men, Memorial Day Surprise: Vintage Sailor Love, Memorial Day: Vintage Dancing Sailors, The Curious Case of Two Men Embracing, They'll Never Know How Close We Were, Vintage Love: Roger Miller Pegram,Manly Affections: Robert Gant, Homo Bride and Groom Restored to Dignity, The Men in the Trees, The Girl in the Outhouse, Tommy and Buzz: All My Love,Men in Photo Booths, and Invisible: Philadelphia Gay Wedding c. 1957. You can also follow me on Tumblr.