Golden Spike National Historical Park is located in Utah and commemorates the completion of the first transcontinental railroad in the United States. This historic event took place on May 10, 1869, when the Central Pacific and Union Pacific railroads met at Promontory Summit. The park features a visitor center, exhibits, and reenactments that highlight the significance of this achievement in American history. Visitors to the park can see the iconic Golden Spike, a ceremonial spike that symbolized the joining of the two railroads. The park also offers scenic views of the surrounding landscape and opportunities for hiking and exploring the area's rich history.