Question: Which U.S. National Monument spans 87563 acres of mountains and forestland, and borders a large wilderness area located in Piscataquis County in north-central Maine, United States?
Sentence (from "Baxter State Park"): Baxter State Park is a large wilderness area permanently preserved as a state park, located in Piscataquis County in north-central Maine, United States.
Relevant evidence: Yes