Xian's most recognizable structure, the Bell Tower was built in the late 14th century in what was then the center of the city. It's still good a reference point—the tower marks the point where Xi Dajie (West Main Street) becomes Dong Dajie (East Main Street) and Bei Dajie (North Main Street) becomes Nan Dajie (South Main Street). To reach the tower, which stands isolated in the middle of a traffic circle, use any of eight entrances to the underground passageway. Once inside the building, you'll see Ming Dynasty bells on display. Concerts are given six times daily (9:10, 10:30, 11:30, 2:30, 3:30, and 4:30). For Y5 you can make your own music by ringing a copy of the large iron bell that gives the tower its name. Don't miss the panoramic views of the city from the third-floor balcony.