The Belle Isle Aquarium is a public aquarium located in Belle Isle Park in Detroit, Michigan. Designed by noted architects George D. Mason and Albert Kahn, it opened on August 18, 1904, and was the oldest continually operating public aquarium in North America when it closed on April 3, 2005. The aquarium reopened to the public on August 18, 2012, and is now run entirely by Belle Isle Conservancy, a 501 3 non-profit partner to Belle Isle park.