Red and blue tartan plaid fabric with a pattern of alternating red

Black and white drawing of a machine

Bolt with a nut and washer on a white background

Painting of a harbor with boats in the water

Green banner with the words &quot;Ruta Verde&quot; written in white

Painting of a ship in the ocean surrounded by icebergs

Painting of three men sitting around a table with a cloth draped over it

Old black and white photo of a man with a beard sitting on a chair

Old topographic map of the area of the city of San Francisco