Plymouth County, MA is south of Boston and encompasses the "south shore" region of Massachusetts. The boarders are Hingham in the north, Brockton to the west, Wareham to southwest and Plymouth to the southeast. The county has a total area of 1,093 square miles and is the third-largest county in Massachusetts by total area.

Suffolk County is located in the Commonwealth of Massachusetts. As of 2019, the population estimate was 803,907 making it the fourth-most populous county in Massachusetts.

Parklands include Boston National Historic Park, Boston Harbor Islands State Park, and Boston Common.

Middlesex County is located in the Commonwealth of Massachusetts

National protected areas include Assabet River National Wildlife Refuge, Great Meadows National Wildlife Refuge, Longfellow House–Washington's Headquarters National Historic Site, and Lowell National Historical Park.

Bristol County is a county in the Commonwealth of Massachusetts.

Visit the Horseneck Beach State Reservation or Freetown-Fall River State Forest. Other areas include the national protected area New Bedford Whaling National Historical Park.

Norfolk County is located is right outside Boston, MA. The county is not completely contiguous; the towns of Brookline and Cohasset are each part of Norfolk County but are separated from the majority of Norfolk County (and each other) by either water or other counties. At the county's formation, Hingham and Hull were to be part of it, but joined Plymouth County instead, leaving Cohasset as the initial exclave of Norfolk County and an enclave of Plymouth County. Brookline became the second exclave of Norfolk County in 1873 when the neighboring town of West Roxbury was annexed by Boston (thus leaving Norfolk County to join Suffolk County) and Brookline refused to be annexed by Boston after the Brookline-Boston annexation debate of 1873.

Worcester County is the county has a total area of 1,579 square miles. It is the largest county in Massachusetts by area. The county is larger geographically than the entire state of Rhode Island even including Rhode Island's water ocean limit boundaries. The county constitutes Central Massachusetts, separating the Greater Springfield area from the Greater Boston area. It stretches from the northern to the southern border of the state. The geographic center of Massachusetts is in Rutland. Worcester County is one of two Massachusetts counties that borders three different neighboring states; the other being Berkshire County. They are also the only two counties to touch both the northern and southern state lines.

Springfield County MA sits on the eastern bank of the Connecticut River near its confluence with three rivers: the western Westfield River, the eastern Chicopee River, and the eastern Mill River. Located in the fertile Connecticut River Valley (or Pioneer Valley if you are just talking about the part in Massachusetts), Springfield is surrounded by mountains, bluffs, and rolling hills in all cardinal directions.

Nantucket is an island about 30 miles by ferry from Cape Cod, Massachusetts. Together with the small islands of Tuckernuck and Muskeget, it constitutes the Town and County of Nantucket, a combined county/town government. It is the only such consolidated town-county in Massachusetts. The name "Nantucket" is adapted from similar Algonquian names for the island, perhaps meaning "faraway land or island" or "sandy, sterile soil tempting no one". Nantucket is a tourist destination and summer colony. Due to tourists and seasonal residents, the population of the island increases to at least 50,000 during the summer months. The National Park Service cites Nantucket, designated a National Historic Landmark District in 1966, as being the "finest surviving architectural and environmental example of a late 18th- and early 19th-century New England seaport town."