Nothing’s more frustrating than wasting your time in port waiting in exasperatingly long lines just to get tickets for historic and iconic sights you’ve been dying to see. By the time you arrive, you’re so frazzled that you don’t fully absorb the history and beauty of the museums, palaces, and castles you came to visit. So book your tour with one of these six European operators and waltz past the snaking lines like a VIP — then start savoring the experience.