Ever been baffled by the multitudinous welter of place names in one of your study sites? Debaffle yourself fast on the free, easy to use U.S. Board on Geographic Names web site.
You can search for domestic, foreign, and international names, or toponyms. The database includes islands, villages, fjords, and mountains among other features, and shows variants as well as approved terms. It deals with every kind of diacritical mark. You can also see a Google map of a selected toponym, to make sure that you've got the right place.
If you're wrestling with the spelling of an area in Greenland, wondering whether Northeast Atlantic should be capitalized, or puzzling over whether a bit of Alaskan coastline is a cape or a peninsula, this is the resource for you.