The most sacred mountain in the history of Taoist belief, Wudang is part of a small mountain chain in the northwestern Hubei Province, a 5 hour trip south from Xi'an. Less frequented by tourists than other mountain retreats because of its isolation from other tourist activities, these monasteries are actually one of the best-preserved examples of Taoist culture to be found anywhere.
You'll need to find transport from the city of Shiyan, and then walk the 700 plus steps into a forested landscape, where you'll find monks utilizing the solitude to practice meditation and develop inner resolve. Notable landmarks include the Golden Hall, Nanyan Temple and the Purple Cloud Temple, some of the few places of worship open to the public. If you have two days in your itinerary to spend in pursuit of Taoist culture, you can do no better.
Note:Fun fact: the Wudang Mountain Monasteries are known as the birthplace of the martial art, Tai Chi.