While driving in Bavaria my wife was programming the GPS. Since she new nothing of umlauts (https://en.wikipedia.org/wiki/Umlaut) we ended up going to a tiny farming community rather than a town near Schloß Neuschwanstein. Luckily, a suitable castle also constructed by King Ludwig can be found in nearly every part of Bavaria, a few minutes searching turned one up, and it turned into an unexpectedly wonderful day.

GPS errors can bring good experiences as well.