Back in June Flickr did a major redesign, with larger image displays, a cleaner interface, and lots of interaction improvements. One of the more subtle updates is the way the small map displays the location of a geo-tagged photo.
The closer the user moves the mouse to the marker, the more the map zooms in. First, a country-level map view is shown (1). As soon as the user hovers over the map it automatically zooms into a city-level view (2). When the mouse is moved over the marker the maps finally zooms to the neighborhood (3).
A simple and neat interaction pattern to display locations with overview and increasingly more details-on-demand.