Alliant Energy Center is a multi-building complex located in Madison, Wisconsin. It comprises 164 acres (0.66 km²) of greenspace and includes the 255,000-square-foot (23,700 m²) Exhibition Hall, the 10,000-seat Veterans Memorial Coliseum, the 29-acre (0.12 km²) Willow Island, several multi-use pavilions, and the 22,000-square-foot (2,000 m²) Arena. The Center welcomes more than one million people attending more than 500 events annually, ranging from local meetings and banquets to large sporting events and major concerts.