Chenjiagou, Henan, is the village where is said Taijiquan is originating from.
How do I get to Chen Village? Catch a train or plane to Zhengzhou. It used to be a 3 hour bus ride to the small town of Wenxiang, but a new bridge across the Yellow River should cut this down by half. About 15 minuets before you get to Wenxiang, you jump off the bus at a point known as the junction for Chen Village (Chenjiagou menkou). From there its a 5 minute ride on a motorcycle rickshaw. Alternatively you could splash a bit of currency at the train station and get a taxi there instead.
For more info and details:
http://www.chenjiagou.net/
http://www.chenbing.org/english/
http://www.chenvillage.com/