Those cool folks at the Chicago Public Art Group have an awesome "Public Art Map" that allows people to view and learn about public art installations all over the city: sculptures, mosaics, installations - they've got a lot of entries all on one handy Google map. (In fact, they've done such a great job populating the map with public art examples that you'll probably need to zoom in to a specific neighborhood to be able to see everything! :)
"The Electronic Cultural Atlas Initiative is a global consortium of people who share the vision of creating a distributed virtual library of cultural information with a time and place interface. ECAI is a global consortium incorporating scholars in the humanities, social sciences and history; archivists, librarians and curator; members of non-governmental organization; and information technology researchers."
They've got some interesting uses of maps as atlases containing digital storytelling, as well as links to hundreds of maps and geo pieces related to various aspects of culture.
MapTogether's website development team built this simple interactive database-with-map of local community art fairs in Illinois. Visitors can search for a specific fair or browse through a map of the state and zoom into their particular region. A dynamically-generated calendar of upcoming fairs and associated registration deadlines is available as well.