Berlin BVG MAN Wagon-Union 3375 at Zoo Bahnhof

As in London one doesn't need to empty their wallet to see the city on enthusiastically touted sightseeing tours as the less pampered and more outgoing tourists who don't mind crowding in alongside the locals can see it all on the local buses paying normal fares and routes like the 100 will always have double-deckers and must be a thorn in the side. I might be wrong but if I remember rightly before Reunification there used to be far more sightseeing buses in West Berlin doing the sights and going over into the East than when I was last there about eight years ago.