Three thematic clusters define unique and distinctive features of Montgomery County:
* The Farming Cluster in the western part of the county is set in the 93,000 acre Agricultural Reserve, one of the most successful farmland preservation programs in the U.S. Although Montgomery County is known for its urban regions, the Agricultural Reserve showcases historical landscapes that look much as they did in 19th- and early 20th- century America. Poolesville, a farming center since the 18th century, is the gateway to the Farming Cluster.
* The Quaker Cluster is located in eastern Montgomery County. The town of Sandy Spring was an early Quaker community and has an 1817 Friends Meetinghouse still in active use today. The area was home to one of the earliest free black communities in the country; many homes in the area are believed to have been part of the Underground Railroad.
* The Innovative Technology Path focuses on the Chesapeake & Ohio Canal along the Potomac River and the Metropolitan Branch of the B & O Railroad which includes a number of significant late-19th century communities. These endeavors relate directly to the growth and development of Montgomery County from the 17th through the 19th centuries. Extraordinary engineering feats are on view all along the Canal and in particular at the 1833 Monocacy Aqueduct. Sites along the Canal and the Potomac River played significant roles during the Civil War.
Heritage Montgomery’s signature program, Heritage Days, a free, county-wide event, is held annually on the last weekend of June when over 40 sites are open to the public.