9. A computer program product comprising a computer usable medium having control logic stored therein for causing a computer to enhance user queries, said control logic comprising: a first computer readable program code that enables the computer to receive a user query and identify one or more trigger words in the user query; a second computer readable program code that enables the computer to select one or more corresponding tags from a landmark database corresponding to the one or more trigger words; a third computer readable program code that enables the computer to supplement the user query with the one or more corresponding tags to generate a supplemented user query; a fourth computer readable program code that enables the computer to retrieve landmarks based on the supplemented user query; and a fifth computer readable program code that enables the computer to generate a user interface including the one or more retrieved landmarks and display one or more summary lists of visual clusters for the retrieved landmarks on the user interface, wherein each summary list corresponds to one of the retrieved landmarks, and to display popularity information on the one or more summary lists.
9. A computer program product comprising a computer usable medium having control logic stored therein for causing a computer to enhance user queries, said control logic comprising: a first computer readable program code that enables the computer to receive a user query and identify one or more trigger words in the user query; a second computer readable program code that enables the computer to select one or more corresponding tags from a landmark database corresponding to the one or more trigger words; a third computer readable program code that enables the computer to supplement the user query with the one or more corresponding tags to generate a supplemented user query; a fourth computer readable program code that enables the computer to retrieve landmarks based on the supplemented user query; and a fifth computer readable program code that enables the computer to generate a user interface including the one or more retrieved landmarks and display one or more summary lists of visual clusters for the retrieved landmarks on the user interface, wherein each summary list corresponds to one of the retrieved landmarks, and to display popularity information on the one or more summary lists. 11. The method of claim 9 , wherein the popularity criteria includes a popularity of landmarks based on a number of unique user identifiers associated with images having each landmark.