The Detroit River International Wildlife Refuge is the only international wildlife refuge in North America. The refuge includes islands, coastal wetlands, marshes, shoals, and waterfront lands along 48 miles of the Detroit River and Western Lake Erie shoreline. Its location is unique, situated in the heart of a major metropolitan area. Detroit River International Wildlife Refuge is one of over 540 National Wildlife Refuges managed by the U.S. Fish and Wildlife Service within the Department of the Interior. A Wildlife refuge is a geographic territory within which wildlife is protected. ... World map showing location of North America A satellite composite image of North America North America is the third largest continent in area and in population after Eurasia and Africa. ... Detroit River seen from Grosse Ile Township, Michigan The Detroit River is about 51 km (32 miles) long and 1 to 4 km (0. ... National Wildlife Refuge is a designation for certain protected areas of the United States managed by the United States Fish and Wildlife Service. ... The USFWS logo The United States Fish and Wildlife Service is a unit of the United States Department of the Interior that is dedicated to managing and preserving wildlife. ... The United States Department of the Interior (DOI) is a Cabinet department of the United States government that manages and conserves most federally-owned land. ...