Northerly Island is a 119-acre (48 ha) man-made peninsula and park located on Chicago's Lake Michigan lakefront. Originally constructed in 1925, Northerly Island was the former site of the Century of Progress world's fair and later Meigs Field airport and, since Meigs Field's closure, has been a recreational area part of Chicago's Museum Campus. It is the site of the Adler Planetarium, the Huntington Bank Pavilion, the Northerly Island Natural Area, the 12th Street Beach and numerous art installations. Per its name, Northerly Island was constructed as an island, but is connected to the lakefront by a causeway at the northern end carrying Solidarity Drive to the planetarium.