List of National Natural Landmarks in Pennsylvania

From List of National Natural Landmarks, these are the National Natural Landmarks in Pennsylvania. There are 27 in total, X are lakes or pond, Y are forests, Z are other.

	Name	Image	Date	Location	County	Description
1	Bear Meadows Natural Area		1965	Four miles south of Boalsburg, within Rothrock State Forest 40.406111°N 77.173889°W / 40.406111; -77.173889 (Bear Meadows Natural Area)	Centre
2	Box Huckleberry Site		01967-04 April 1967	New Bloomfield 40.406111°N 77.173889°W / 40.406111; -77.173889 (Box Huckleberry Site)	Perry	A 10-acre (4.0 ha) natural area which preserves a rare colony of box huckleberry over 1,000 years old. Part of Tuscarora State Forest.
3	Cook Forest		01967-11 November 1967	Clarion 41.323611°N 79.163889°W / 41.323611; -79.163889 (Cook Forest)	Clarion, Forest , Jefferson	A 8,500-acre (3,440 ha) state park notable for its spectacular stands of old-growth Eastern White Pine and Eastern Hemlock, many from around 1644.
4	Ferncliff Peninsula Natural Area		1973	Ohiopyle 39.867555°N 79.498229°W / 39.867555; -79.498229 (Ferncliff Peninsula Natural Area)	Fayette	Part of Ohiopyle State Park, this peninsula is formed by a meander in the Youghiogheny River. It is a good example of a late successional forests in the Allegheny Mountains
6	Florence Jones Reineman Wildlife Sanctuary		1973	Near Carlisle 40°16′0″N 77°16′0″W	Cumberland, Perry
7	Pine Creek Gorge		1968	Situated in approximately 160,000 acres (650 km²) of the Tioga State Forest, the Canyon begins south of Ansonia, near Wellsboro, along U.S. Route 6 and continues for approximately 47 miles (76 km) south. 41.271667°N 77.326944°W / 41.271667; -77.326944 (Pine Creek Gorge)	Tioga, Lycoming	Known as the "Grand Canyon of Pennsylvania", a deep gorge carved by glacial meltwater. The maximum depth of the canyon is 1,450 feet (442 m) at Waterville, near the southern end. At Leonard Harrison and Colton Point State Parks, the depth is more than 800 feet and from rim to rim is approximately 4,000 feet (1200 m).
8	Hawk Mountain Sanctuary		1965	40.645556°N 75.98°W / 40.645556; -75.98 (Hawk Mountain)	Berks	A privately-owned sanctuary on an Appalachian ridge, known as an excellent vantage point for hawk migrations.
9	Hearts Content Scenic Area		1973 or 1977	41.691°N 79.254°W / 41.691; -79.254 (Hearts Content National Scenic Area)	Warren
10	Hemlocks Natural Area		1972	Within Tuscarora State Forest 40.2384178°N 77.6413785°W / 40.2384178; -77.6413785 (Hemlocks Natural Area)	Perry
11	Hickory Run Boulder Field		1967	Kidder and Penn Forest 41.036111°N 75.683889°W / 41.036111; -75.683889 (Hickory Run State Park)	Carbon
12	Lake Lacawac		1968	Near the southwestern portion of Lake Wallenpaupack 41.382289°N 75.292078°W / 41.382289; -75.292078 (Lake Lacawac)	Wayne
13	McConnells Mill State Park		1972	Perry and Slippery Rock Townships40.926667°N 80.19°W / 40.926667; -80.19 (McConnells Mill State Park)	Lawrence
14	Monroe Border Fault		1980	Near Riegelsville 40.579756°N 75.197556°W / 40.579756; -75.197556 (Monroe Border Fault)	Bucks
15	Nay Aug Park Gorge and Waterfall		1989	Scranton 41.401389°N 75.642778°W / 41.401389; -75.642778 (Nay Aug Park Gorge and Waterfall)	Lackawanna
16	Nottingham Park Serpentine Barrens		02009-01 January 2009	Nottingham 39.740507°N 76.039112°W / 39.740507; -76.039112 (Nottingham County Park)	Chester	A 651-acre (263 ha) county park on one of the largest outcrops of serpentine in the eastern US, which creates a savanna-like habitat with a number of unusual flora.
17	Presque Isle		1967	West of the city of Erie, in Millcreek Township 42.163056°N 80.100833°W / 42.163056; -80.100833 (Presque Isle State Park)	Erie
18	Reynolds Spring and Algerine Swamp Bogs		1974	Primarily within Tioga State Forest 41.5509021°N 77.4974807°W / 41.5509021; -77.4974807 (Reynolds Spring and Algerine Swamp Bogs)	Tioga, Lycoming
19	The Glens Natural Area		1968	Sugarloaf, Fairmount, Ross, Colley, and Davidson 41°19′34″N 76°16′46″W	Columbia, Sullivan, Luzerne
20	Snyder Middleswarth Natural Area		1967	Within Bald Eagle State Forest in Spring Township 40.81°N 77.283056°W / 40.81; -77.283056 (Snyder Middleswarth Natural Area)	Snyder
21	Susquehanna Water Gaps		1968	About four miles south of Liverpool; about a mile south of Millersburg; south to Harrisburg40.5209177°N 76.9788665°W / 40.5209177; -76.9788665 (Susquehanna Water Gaps)	Cumberland, Dauphin, Perry	Millions of years of erosive rock create impressive landforms of unique geologic heritage and outstanding natural beauty, as the Susquehanna River cuts through five ridges of the Appalachian Mountains north of Harrisburg.
22	Tamarack Swamp		1973	About seven miles north of Renovo 41.4234°N 77.83944°W / 41.4234; -77.83944 (Tamarack Swamp)	Clinton
23	Tannersville Cranberry Bog		1974	Tannersville 41°2′24″N 75°18′21.6″W	Monroe
24	John Heinz National Wildlife Refuge at Tinicum		1965	Located in Tinicum Township, the refuge is adjacent to the Philadelphia International Airport 39.885866°N 75.262356°W / 39.885866; -75.262356 (John Heinz National Wildlife Refuge at Tinicum)	Philadelphia, Delaware
25	Tionesta Scenic and Research Natural Areas		1973	Located approximately seven miles west of Kane41.645°N 78.941°W / 41.645; -78.941 (Tionesta Scenic and Research Natural Areas)	Warren, McKean
26	Titus and Wattsburg Bogs		1977	Approximately four miles to the southeast of Wattsburg41.9433882°N 79.7631068°W / 41.9433882; -79.7631068 (Titus and Wattsburg Bogs)	Erie
27	Wissahickon Valley		1964	Located within Fairmount Park 40.016056°N 75.205744°W / 40.016056; -75.205744 (Wissahickon Valley)	Montgomery, Philadelphia	Tributary of the Schuylkill River which it joins in Fairmount Park, Philadelphia, near Germantown. Runs through Fort Washington State Park