Ireland: Pack a "bilingual" map if you’re heading to the Gaeltacht.

English is now outlawed in road signs in these Irish (Gaelic)-speaking communities, found along the western seaboard, on some islands, and in pockets in West Cork and County Waterford. So be sure to use a map with place names in both English and Irish (you can’t rely on official Ordnance Survey maps, which now only prints Irish place-names in these areas).