Only fortified North American city north of Mexico to retain its walls. Inscribed 1985.
From Wikipedia
Old Quebec is a historic neighbourhood of Quebec City, Quebec, Canada. Comprising the Upper Town and Lower Town, the area is a UNESCO World Heritage Site. Administratively, Old Quebec is part of the Vieux-Québec–Cap-Blanc–colline Parlementaire district in the borough of La Cité-Limoilou.