This looks like a weird D-Day commemoration (the 70th anniversary is two weeks away) but is really a combination of two things: Mark di Suvero's monumental sculpture show and the transportation of all the dead in San Francisco, with the exception of those in Mission Dolores and the military cemetery, to the city of Colma in the first half of the 20th century. The migration of the dead left a lot of funereal monuments and grave stones and those were used to stabilize the beaches along the ocean and the bay.
Here's a different angle on the same sculpture.
and a companion piece.
And here's the bounty of the bay, a stripped bass.
Madame Le Chef, the bureau's resident scientist, read a nearby sign that suggested that stripped bass was in the less desirable category for human consumption because of possible chemicals. At least it wasn't outright prohibited.