Large dam on a river with rocks and trees in the background

Open book with a drawing of a man standing in front of a tree

Yellow building with a truck parked in front of it

Group of men standing next to an airplane on a grassy field

Group of men riding horses down a dirt road

Old map of the city of San Francisco

Round building with a window in the middle of it

White and red airplane flying through a cloudy sky

Tall building with many windows on the side of it