1. A computer-implemented method for providing location-based information, the method comprising: receiving, at a server system, a geographical location of a mobile computing device; receiving, at the server system and from the mobile computing device, a request for content; selecting, by the server system, a search area that corresponds to the geographical location, the search area selected from among a collection of search areas that correspond to the geographical location, at least one of the search areas in the collection being geographically nested within at least one other of the search areas; determining, by the server system, a search result that is most-relevantly ranked for the selected search area; and providing, by the server system and for receipt by the mobile computing device, content that represents the determined search result.