1. A method, comprising: receiving, in a system comprising one or more computers, natural feature mapping data, the natural feature mapping data representing geographic footprints of a plurality of natural features; receiving, in the system, political feature mapping data, the political feature mapping data representing geographic footprints of a plurality of political features; classifying, by operation of the system, each of the plurality of natural features as a destination or not a destination, comprising: classifying at least one of the natural features as a destination based at least in part on determining that the geographic footprint of the natural feature overlaps with more than one of the geographic footprints of the plurality of political features, wherein the geographic footprint of the natural feature overlaps with the geographic footprint of a political feature when an intersecting portion of the geographic footprints is of at least a minimum threshold size; and storing, by operation of the system, data representing the natural features classified as a destination in a geographic data store.