Black and white topographic map of the city of San Francisco

Small stream running through a lush green field

Small stone sculpture of a tortoise on a grey background

Cross section of a human breast with a small amount of pink spots

Woman walking down a narrow street at night

Man and woman standing outside of a building

Open book with a drawing of a map on it

Group of people standing in front of a sign that reads &quot;Univac&quot; in a…

Black and white photo of a train on the tracks with a group of people…