1. A method for generating semantic image navigation experiences, the method comprising: selecting, by one or more computing devices, a first geographic entity of a plurality of distinct geographic entities; identifying, by the one or more computing devices, a plurality of distinct geographic sub-entities, each distinct geographic sub-entity having a geographic containment relationship with the first geographic entity, the plurality of distinct geographic sub-entities including: a first distinct geographic sub-entity that is both (i) visually represented by at least one landmark corresponding to the first distinct geographic sub-entity and (ii) associated with a pre-stored navigation experience of a plurality of pre-stored navigation experiences that is unique to the first distinct geographic sub-entity, and a second distinct geographic sub-entity that is not at least one of (i) visually represented by at least one landmark corresponding to the second distinct geographic sub-entity and (ii) associated with a pre-stored navigation experience of the plurality of pre-stored navigation experiences that is unique to the second distinct geographic sub-entity, wherein each pre-stored navigation experience in the plurality of pre-stored navigation experiences corresponds to a given geographic entity and comprises a sequence of images and transitions between the images that produces a tour of at least one landmark associated with the given geographic entity; filtering, by the one or more computing devices, the plurality of distinct geographic sub-entities to remove at least one distinct geographic sub-entity that is not at least one of (i) visually represented by at least one landmark and (ii) associated with a pre-stored navigation experience of the plurality of pre-stored navigation experiences that is unique to the at least one distinct geographic sub-entity, the at least one distinct geographic sub-entity including the second geographic sub-entity; determining, by the one or more computing devices, a ranking order of the filtered plurality of distinct geographic sub-entities based at least in part on one or more characteristics of each distinct geographic sub-entity in the filtered plurality of distinct geographic sub-entities; selecting, by one or more computing devices, a subset of at least two distinct geographic sub-entities based on the ranking order; and generating, by the one or more computing devices, a semantic image navigation experience for the first geographic entity based on at least the pre-stored navigation experiences associated with the subset of at least two distinct geographic sub-entities by: automatically selecting a plurality of images from each pre-stored navigation experience of the subset of at least two distinct geographic sub-entities, and including the plurality of selected images in the semantic image navigation experience as a sequence of images based on the ranking order.