Guam
A great political map, comprehensive data, and flag from the CIA World Factbook.

Infoplease Atlas Map of Guam
A large and detailed map of the state that includes many cities along with major highways.

Map of Guam
A large and very detailed shaded relief map of Guam from the PCL Map Collection.

Guam
Great data and historical information from Infoplease.com.

Visit Guam
The official tourism site; a plethora of information.