The world's largest indoor air-conditioned pedestrian tunnel system, the 7-mile system of underground tunnels and skywalks includes a variety of shops and more than 100 restaurants. Connects 65 buildings with three hotels in the downtown area. Wheelchair accessible. Tours available. Maps available at Visitor Information Center, open daily 9 a.m. - 4 p.m., at 901 Bagby. For more information, call 800/4-HOUSTON.