Topography
According to the United States Census Bureau, the city has a total area of 143.0 square miles (370.2 km²); of this, 138.8 square miles (359.4 km²) is land and 4.2 square miles (11 km²) is water. The highest elevation in Detroit is in the University District neighborhood in northwestern Detroit, just west of Palmer Park sitting at a height of 670 feet (204 m). Detroit's lowest elevation is along its riverfront, sitting at a height of 579 feet (176 m). Detroit completely encircles the cities of Hamtramck and Highland Park. On its northeast border are the wealthy communities of Grosse Pointe. Oakland and Macomb counties lie to the north. Alter Road divides Detroit and Grosse Pointe Park; the neighborhood in this area of Detroit's east side is one of the most blighted in the city, whereas the Grosse Pointes contain multimillion dollar mansions within blocks of the border and many of the wealthiest residences. The Detroit River International Wildlife Refuge is the only international wildlife preserve in North America, uniquely located in the heart of a major metropolitan area. The Refuge includes islands, coastal wetlands, marshes, shoals, and waterfront lands along 48 miles of the Detroit River and Western Lake Erie shoreline.
The city is crossed by three road systems: the original French template, radial avenues from a Washington, D.C.-inspired system, and true north–south roads from the Northwest Ordinance township system. It sits atop a large salt mine and is north of Windsor, Ontario. Detroit is the only major city along the U.S.-Canadian border in which one travels south in order to cross into Canada. Detroit has four border crossings: the Ambassador Bridge and the Detroit-Windsor Tunnel provide motor vehicle thoroughfare; the Michigan Central Railway Tunnel provides railroad access to and from Canada. The fourth border crossing is the Detroit-Windsor Truck Ferry, located near the Windsor Salt Mine and Zug Island.
(Source: Wikipedia.org)
