Urban Stealth( Races of Destiny, p. 154)
You are particularly adept at moving quietly and unnoticed through the city.
Knowledge (local) 2 ranks,
You gain a +3 bonus on Hide and Move Silently checks in a small city or larger community. This bonus applies only when you are outside--trying to hide in a bedroom or office does not benefit from this feat, since your knowledge of urban environments is no help in such confined spaces.