Meadowcroft Rockshelter is an archaeological site located near Avella in Jefferson Township, Washington County, in southwestern Pennsylvania, United States. The site, a rock shelter in a bluff overlooking Cross Creek (a tributary of the Ohio River), is located 27 miles west-southwest of Pittsburgh in the Pittsburgh metropolitan area. The site, including a museum and re-creation of a circa 1570s Monongahela Culture Indian village, operates as a division of the Heinz History Center. The artifacts from the site show the area has been continually inhabited for over 19,000 years, since Paleo-Indian times. The Rockshelter was named a National Historic Landmark in 2005. It is also recognized as a Pennsylvania Commonwealth Treasure and is an official project of Save America's Treasures.