The museum is situated on an 80-foot (24 m) bluff overlooking the Tennessee River and downtown Chattanooga. The building itself represents three distinct architectural stages: the original 1904 classical revival mansion designed by Abram Garfield which has housed the museum since its opening in 1952, a brutalist addition built in 1975, and a 2005 addition designed by Randall Stout which now serves as the entrance to the museum. With the 2005 expansion, the Hunter extended toward downtown. The Ruth S. and A. William Holmberg Pedestrian Bridge provides a pedestrian-friendly connection to the nearby Walnut Street Bridge and riverfront attractions. The glass bridge allows pedestrians to cross over Riverside Drive.