This major milestone in transportation history occurred on May 10, 1869.
Pony Express began
Combustion engine invented
Bicycle invented
Driving of the Golden Spike
Driving of the Golden Spike connecting the Union and Central Pacific railroads near Brigham City, Utah, to complete the United States’ first transcontinental railroad. A National Historic Site commemorates the spot, but the actual Golden Spike is on display in Palo Alto, California.