The Nimbus Dam is on the American River near Folsom, California.
The American River and the Sacramento River join together near Sacramento.
Sutter's Fort was built in 1839 by John Sutter.
It was the first European colony in the Central Valley of California.
It became the city of Sacramento.
The Pacific Railroad connected California to the rest of the United States.
People and supplies from other states came to California on trains.
This railroad car is outside of the California State Railroad Museum in Old Sacramento.