1. A method performed by one or more data processing apparatuses, the method comprising: identifying a general search query that does not include a location phrase, wherein a location phrase is one or more terms that specify a geographic location; determining, for the general search query, a map query rate based on a ratio of a number of times that the general search query was received through an online map interface presenting the geographic location relative to a total number of times that the general search query was received; determining that the general search query is a locally significant query for the geographic location based, at least in part, on the map query rate for the general search query exceeding a threshold value; creating a local search query using the general search query and a location phrase representing the geographic location; requesting a set of general search results responsive to the general search query and a set of local search results responsive to the local search query; selecting, from the set of general search results and the set of local search results, a final set of search results including at least one local search result from the set of local search results and at least one general search result from the set of general search results; and providing data that cause presentation of the final set of search results.