I can spot a German tourist in a second. They all wear Birkenstock sandals with socks
and they're loud, very loud and always looking for an ashtray.
They wear speedos at the beach and carry huge amounts of cash with them and buy, buy, buy....I'd hate to see the baggage overage they pay at the airlines. Yet, when it comes to tipping the waiter, they're more than frugal....in Germany the tip is included in the restaurant tab, so they don't feel that they should pay extra tip here.
They rarely stop at the 4-way stops or for pedestrians and strangely enough they tend to single me out and ask for directions. Oh the surprise when I answer them in German.