This is not just a just a gazetteer but somewhat of an encyclopedia based on geographic names. Type in a place name and you will receive a number of results. Click on the little icon next to one of these results to find out it’s hierarchy (sort of like “The Universe, Milky Way, Solar System, Earth, North America, etc.”). Click on the name of the result and you’ll receive latitude and longitude values and sometimes a little history, and other sub-names that would fall under this result (e.g. neighbourhoods in cities). It also lists sources.

By way of Extrapolated Facts.