You’ve probably seen the red hop-on, hop-off buses in Rome and other cities (there’s even now a hop-on, hop-off bus along the Amalfi Coast)…Perhaps it was only a matter of time before a hop-on, hop-off tourist boat came to the waterways of Venice. Earlier this month a hop-on, hop-off vaporetto service began on Venice’s Grand Canal. Vaporetto dell’Arte runs daily from 9 a.m. …