Polymath Park

Acme is an unincorporated community in Donegal, Mount Pleasant and Bullskin townships in Pennsylvania, United States. The Acme ZIP code of 15610 extends well beyond the more densely populated part of the area, into rural parts of Donegal Township in Westmoreland County and Bullskin Township in Fayette County.

Kecksburg is an unincorporated community in Mount Pleasant Township, Westmoreland County, Pennsylvania, United States. Located in a heavily wooded area along PA Route 982, it is approximately thirty miles southeast of Pittsburgh at an elevation of 1,209 feet.

Bear Rocks is an unincorporated community and census-designated place in Bullskin Township, Fayette County, Pennsylvania, United States. It is located along the south side of Pennsylvania Route 31 in northern Fayette County, on the western slope of Chestnut Ridge. The elevation ranges from 1,150 feet (350 m) above sea level at the northwestern end of the community, in the valley of Jacobs Creek, to 2,196 feet (669 m) near the southeastern corner of the community, at the intersection of Kreinbrook Hill Road and Sky Top Road. In 1977, Bear Rocks was the site of a controversial murder. A local man, David Munchinski, was found guilty of the crime and served 26 years in prison. He was later found to have been wrongfully convicted and was released.

Laurel Run is a 3.76 mi (6.05 km) long 2nd order tributary to Jacobs Creek in Westmoreland County, Pennsylvania.

The Mammoth Mine disaster or Frick Mine explosion occurred on January 27, 1891 just after 9:00 AM in the Mammoth No. 1 mine in Mount Pleasant Township, Westmoreland County, Pennsylvania. Newspapers reported that firedamp was ignited by a miner's oil lamp, resulting in the deaths of 109 men and boys. Most of the miners were not killed by the force of the explosion, but rather were suffocated by the effects of afterdamp.

Stahlstown is a small unincorporated community that is located in Cook Township, Westmoreland County, Pennsylvania, United States. It is situated fifty miles south of Pittsburgh, just a few miles from the Donegal exit on the Pennsylvania Turnpike, at the intersection of route 711 and route 130.

Trauger is an unincorporated community and coal town in Westmoreland County, Pennsylvania, United States. An architecturally impressive historic structure built in 1914, St. Mary's Byzantine Catholic Church is large brick building in the Spanish Renaissance style.

Pleasant Unity is an unincorporated community in a rural section of Unity Township, Westmoreland County, Pennsylvania, United States. It is located at the junction of state routes 130 and 981, 6.3 miles (10.1 km) southeast of Greensburg. Pleasant Unity has a post office, with ZIP code 15676, which opened on November 2, 1825. The area covered by this zip code has a population of 437. The Jamison Coal and Coke Company operated an underground bituminous coal mine near Pleasant Unity during the period from 1918 through the early 1960s. Known as Jamison No. 20, the mining complex was off Route 981, three miles north of the town. The company store was located on Route 981 at Phillips Street. The mine was served by the Unity Branch of the Pennsylvania Railroad. By 1940, it employed approximately 300 miners.

Unity Township is a township in Westmoreland County, Pennsylvania, United States. The population was 21,724 at the 2020 census, a decline of approximately 4% compared to the 2010 census. The township is home to Saint Vincent Archabbey, College and Seminary, as well as Arnold Palmer Regional Airport. The Norfolk Southern Railway (once part of the Pennsylvania Railroad mainline) runs through the northern section of the township.

Chestnut Ridge is the westernmost ridge of the Allegheny Mountains in Pennsylvania, United States. It is located primarily within the Laurel Highlands region of southwestern Pennsylvania, extending into northern West Virginia.

United is located in Mount Pleasant Township, Westmoreland County, Pennsylvania, United States. It is a community located near Norvelt.

Welty Run is a 6.59 mi (10.61 km) long 3rd order tributary to Sewickley Creek in Westmoreland County, Pennsylvania. This is the only stream of this name in the United States.