The Bell Tower of Xi'an is one of the city's most famous attractions. Cities of Ancient China each had their own bell tower and drum tower, which were used to tell time. Bells were rung at dawn, while the sound of drums signaled dusk's arrival.
The tower is over 600 years old (Ming dynasty 1368-1644), and it is thought to be the largest and best preserved bell tower in China. Both towers are located in the center of Xi'an, and connect with roads coming from the north, south, east and west.
You can visit the Bell Tower during the day, where you'll get a beautiful panoramic view of Xi'an if it's a clear day. Xi'an is known for its air pollution, which is why I recommend visiting it at night. You can't go in the building past 9pm, but a night time visit makes for some truly spectacular images of Xi'an. Numerous art exhibits are also held inside throughout the year.
The entrance to the Bell Tower is on Bei Dajie, where tickets can be purchased for both towers for around 35RMB.
8:30am to 9pm April through October
8:30am to 6pm November through March