Information on Tourism in Andhra Pradesh in Wikipedia Encyclopedia.
Tourism in the cities of Andhra Pradesh like Hyderabad, Tirupati, Sri Kalahasti, Basar, Visakhapatnam, Nagarjuna sagar, Vijaywada, Warangal, Nellore etc. are detailed in the wikipedia entry.
There are some external website links also available.
Web : http://en.wikipedia.org/wiki/Tourism_in_Andhra_Pradesh