Got a Ticket to Ride

You're visiting a European capital and you'd like to take in some of the sights. But you're not so keen on shelling out for an expensive tourist bus to be assailed by a loud commentary. So why not try public transport? It's cheap, it's fun to sit among the locals, and certain bus and tram routes are so scenic they could have been set specifically with sightseers in mind. Here's a roundup of the best routes:

Berlin: Journey through recent German history on the No. 100 double-decker bus as it crosses from the former West Berlin to...