Maps
The Harvard Map Collection contains one of the world’s finest collections of maps. Although their atlases are in HOLLIS, most of their individual maps are not. To get there, enter Lamont, go down to Level B, walk down the corridor to the West end (where the now closed entrance is), turn right, and walk down the corridor past the Theodore Roosevelt exhibit.
Harvard Map Collection Digital Maps
Perry-Castañeda Library Map Collection
David Rumsey Historical Map Collection
IEG-MAPS: Server for Digital Historical Maps (Institut für europäische Geschichte - Mainz)