The Detroit River Light, also known as Bar Point Shoal Light, was first established as a lightship in 1875. The current sparkplug lighthouse was built in 1885. It sits in Lake Erie, south of the mouth of the Detroit River, 1.75 nautical miles (3.24 km; 2.01 mi) from land and about 20 nautical miles (23 mi; 37 km) from the Ambassador Bridge in the Detroit River.