Interactive Maps

Map Network has very nice interactive maps, where you can see the location of attractions, restaurants, etc for the major US cities. Just click on a building to see pictures, contact information and website of the venue.
The picture below is a map of the National Harbor (DC/Maryland) area:
http://map.mapnetwork.com/destination/dc/nationalharbor/
For other destinations:
http://www.mapnetwork.com/maps_destinations.asp