Yellow Hill was the site of an African American community, including dwellings, a church and cemetery that by the mid-19th century became part of a network of sites providing safe haven for freedom seekers following two of Pennsylvania's major routes of the Underground Railroad. Edward Mathews (1807-1874), a native of Maryland, acquired 16 acres here in 1842 and became a farmer. At Yellow Hill, Mathews collaborated with other free African Americans and their white neighbors - mainly members of the Religious Society of Friends (Quakers) - in assisting hundreds - collectively perhaps up to 1000 - freedom seekers. In addition to activities as an Underground Railroad stationmaster, Mathews was a community benefactor. He bequeathed land adjacent to his homestead for the community church and burial ground. The Yellow Hill African Methodist Episcopal (AKA Union) Church was destroyed
in a suspicious fire sometime in the late 19th century. Veterans of the U.S. Colored Troops were buried at this site. Today, this unassuming parcel of ground remains as the last remnant of the community of Yellow Hill where this chapter in the story of the Underground Railroad can be interpreted.

Huntington Friends Meetinghouse and Cemetery is the burial site of two of Adams County's most prominent Quaker anti-slavery activists and Underground Railroad stationmasters, William Wright (1788-1865) and Phebe Wierman Wright (1790-1873). Huntington Meetinghouse also contains the remains of other members of the Religious Society of Friends who were active in what has come to be called either Pennsylvania's Southeast Corridor or Central Route of the Underground Railroad, both of which originated in Adams County. In 1750 the original meetinghouse and burial ground was established; however, the meetinghouse was replaced in 1790 by the stone structure that is extant today. This is the only known location to appropriately commemorate the lives of the Wrights. The Wrights assisted approximately one thousand freedom seekers during the period 1819 to about 1860, including Dr. James William Charles (J.W.C.) Pennington, also known as Jim Pembroke. Pennington credits the Wrights with helping him to read and write during his six-month refuge, assistance that enabled him to become a Presbyterian Pastor and author of several books, most notably his narrative of escape from slavery in Maryland entitled The Fugitive Blacksmith (1849).

Menallen Friends Meeting (Quakers) is the burial site of Adams County anti-slavery activist and Underground Railroad stationmaster Cyrus Griest (1803-1869). Griest, along with many of his family members buried at Menallen Meeting, were key supporters for freedom seekers passing through Adams County, Pennsylvania, along what has come to be called either the Central Route or the Southeastern Corridor of the Underground Railroad. Menallen Meeting was established in 1780 and worship began at the present site in about 1838. Griest's involvement in the Underground Railroad is established by his collaborative activity with other Quakers and formerly enslaved African Americans who, by the mid-19th century, owned property in the community. This Adams County group is estimated to have been responsible for secreting hundreds - perhaps as many as 1000 freedom seekers. Griest is also recorded as having worked to restore freedom to Kitty Payne, a manumitted slave and the mother of three, who lived in Adams County and who was kidnapped back to the South by agents of her former Virginia owners. Griest, along with fellow Quakers and African American neighbors, gave testimony at the trial in Pennsylvania of her kidnapper in 1845. Griest was involved in raising money among Adams Countians for her trial in Virginia.