Joseph J. Oller House is a historic home located on West Main Street in Waynesboro. Built in 1891–1892, and is a 2 1/-2-story, 17-room brick dwelling in the Queen Anne-style, with a two-story addition added in 1910. The house features a multi-gabled slate roof and a projecting round bay topped by a tower and conical roof. Also on the property is a one-story, wood frame carriage house and two-story, wood frame stable. The Oller House property is the Society's headquarters.

The Oller House is open for visitors:
Thursday: 10AM - 1PM
Friday:  10AM - 1PM
Saturday: 10AM - 1PM

The Oller House is available for private functions and special events. 

Listed on the National Register of Historic Places in 1996.

Harbaugh's Reformed Church, now non-denominational and known as Harbaugh Church, is a historic Reformed church in Washington Township. Available for weddings, funerals and special events. It was built in 1892, and is a 1 1/2-story, three bay by five bay, brick Late Gothic Revival style building. It features a steep, slate covered gable roof, brick buttresses, and lancet stained glass windows. The building replaced an earlier church built in 1846 by George Harbaugh on farmland he owned. The property includes the church cemetery, established about 1845. Regular services were held in the current building until 1966. It was acquired by the Society in 1983.

Harbaugh Church is available for private function, including wedding and funerals. 

Listed on the National Register of Historic Places in 2002.

Erected and opened in 1911 to replace an old one room schoo, the school is a 2-story, four room building located on Route #16 three miles west of Waynesboro in Zullinger. Originally grades 1 through 8 were held in the school with each of the four teachers instructing two grades. As the years went by this changed to one grade level per classroom for grades 1 through 4. Part of this ground belonged to the community. In the summers the playground area was used as a summer recreational area for the local children. The school was closed at the end of the 1961-62 school year.

The school is currently in the process of being nominated to the National Register of Historic Places, and a committee is creating a strategic plan to for restoration.

A Scottish style bridge built by D.S. Stoner over the Antietam Creek around 1798, Mr. Welty opened a mill and distillery manufacturing a brand of rye and malt whiskey famed for over a century. The bridge is a double-arch stone bridge, which sturdily handled automobile traffic until the late 1980's when it was abandoned for a more modern bridge built nearby. Welty's Mill Bridge is again in need of repairs. An important part of Waynesboro History, the Society's goal is to raise funds to have the bridge repaired.