A method includes receiving a request to perform a search; identifying a data structure, of a group of data structures, from which to perform the search, based on a location associated with a user device and a search area within which the user device is located, where the data structure stores information associated with at least one geographic area that is intersected by the search area; retrieving, from the data structure, search results associated with subject matter identified in the request, where the search results are associated with locations within the geographic area; identifying, from the data structure, other user devices that performed searches based on the subject matter; retrieving, from the data structure, other search results based on prior searches, associated with other subject matter, that were performed by the other user devices; and sending, to the user device, the search results or the other search results.