BibleMap.org integrates Google Maps and the ESV text to create an interactive Bible atlas.
You browse to a chapter in the Bible, and all the place names are links. Click one of the names to go that place on the map. Then click the pushpin to show some background information on the place.
(We’d link the image directly to Bethsaida, but it looks like they don’t have linkable URLs yet. It’s probably on their agenda.)
They currently have about 500 places identified by latitude and longitude. Only 600 places to go. (The link goes to a comprehensive list of place-names in the ESV.)