The Park includes the Peirce Barn and Mill and Old Stone House. Peirce Barn and Mill were built in the 1820s, and operated commercially until 1897. The U.S. Government acquired the mill as part of Rock Creek Park in 1892. The Old Stone House, one of the oldest known structures remaining in the nation's capital, is a simple 18th-century dwelling built and inhabited by common people.

NOTE: The Peirce Mill is currently closed for restoration.

The site offers tours, educational programs, and occasional recreational and educational events; the Old Stone House offers tours; the Peirce Barn offers tours.

Professors Wlliam M. Newman and Wilfred E. Holton look at how environmental crises and urban crowding led to the massive project for filling Boston's Back Bay tidal marsh in the 19th century. The presentation includes slides.

The lecture audio can be downloaded separately.

An engineering marvel originally built in 1884, the Georgetown Loop railroad fulfilled the hopes of Georgetown citizens to become a prosperous settlement connected to Denver and points east. In connecting Silver Plume and Georgetown, towns over 2 miles apart, the tracks scaled an elevation of 640 feet over mountainous terrain, requiring trestles, cuts, fills, loops, and curves totaling 4.5 miles. Today the Loop is once again a popular tourist attraction and an uncommon way to see the Clear Creek Valley. Along the route visitors may stop for guided tours of a historic silver mine. The park is located on 978 acres and includes an 1884 depot, the Morrison Interpretive Center, two 1860s mines, an 1871 mill building, four reconstructed mine buildings, a locomotive maintenance building, the 1874 Pohle House, and a new rolling stock shelter.

A second, individual website for the park can be found here.

The park offers a short film, train rides, tours, and exhibits.

Early settlers first established Montauk as a self-sufficient community in the early 1800s. A gristmill, built in 1896, is open seasonally for tours. This historic site was a vital part of the Montauk Community into the 1920s. The "Old Mill" had elaborate milling machinery. Much of it is still located there.

The park offers tours and occasional educational and recreational events.

Battle of Athens State Historic Site interprets the northernmost Civil War battle fought west of the Mississippi River. Some of the land and buildings included in the site were part of the once-thriving town of Athens. Located on the Des Moines River, 19th-century Athens boasted about 50 businesses before the Civil War, including a large mill that produced flour, cornmeal, lumber, cotton, and woolen goods. A large brick hotel, the St. Louis Hotel, was one of many other buildings on the Athens waterfront. Today, only a few structures remain. The historic site administers the remaining buildings in the town of Athens, including the Thome-Benning House, which was pierced by a cannonball during the battle. Exhibits and tours interpret the battle and the history of the town.

The site offers exhibits, tours, occasional living history events, and occasional educational and recreational events.

Indian Mill, built in 1861, is the nation's first educational museum of milling in its original structure. The restored three-story structure replaces the original one-story building that the U. S. government built in 1820 to reward the loyalty of local Wyandot Indians during the War of 1812. Many exhibits are placed around the original mill machinery. The restored miller's office displays the history of milling from prehistoric times to the present.

The mill offers exhibits and tours.