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Sites with vector sources of spatial data
Global bathymetry and coastal GIS data
Automatically retrieves data for your current Arcmap work frame from the following online sources
Free GIS data from Mexico at 1:1 million scale. Note that the content and level of detail in data is suggested by the file size.
Interesting geography blog with locations and 3d visualizations for Google Earth, as well as news and updates.
Frequently updated blog with googleearth locations and visualizations.
"World Energy Geology" series and Geoscience Data Catalog
Browsable text-based website providing population and coordinates for all cities and large towns worldwide. GoogleEarth positions also available.