The park contains the California Historical Landmarks: a monument to commemorate James Marshall (#143),[2] the actual spot where he first discovered gold in 1848 (#530)[3] and Coloma Road (#748).

The Gold Discovery Museum features gold-rush-era exhibits including mining equipment, horse-drawn vehicles, household implements and other memorabilia.

In 1886 the members of the Native Sons of the Golden West, Placerville Parlor #9, felt that the Marshall deserved a monument to mark the grave of the "Discoverer of Gold".

A statue of Marshall stands on top of the monument, pointing to the spot where he made his discovery in 1848.

The monument was rededicated October 8, 2010 by the Native Sons of the Golden West, Georgetown Parlor #91, in honor of the 200th Anniversary of James W. Marshall's birth.