Final answer:
The Meadowcroft Rockshelter is not located in York County, but in Washington County, Pennsylvania. It is a historic archaeological site that provides insights into the earliest human inhabitants of North America.
Step-by-step explanation:
The Meadowcroft Rockshelter is located in Washington County, Pennsylvania, not York County. It is a historic archaeological site that provides insights into the earliest human inhabitants of North America. The rockshelter contains evidence of human occupation dating back more than 16,000 years.