The "clueless tourist" anecdote at the beginning reminds me of a time I agreed to meet a friend in Florence. We agreed to meet "at the David" - I was thinking the one in Piazza della Signoria.
It turns out there are not two, but three Davids in Florence. The one in the Piazza, the one in the Galleria, and a third one in Piazzale Michelangelo, made of bronze.