I guess you can find these sightseeing buses everywhere in large cities. When we were in Madrid we used them last year and I always can see them in Budapest, too. I find them practical since you can stop anywhere and later you can continue your route without knowing the city well.

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Greenville Daily Photo
Barcelona Photoblog

I guess you can find these sightseeing buses everywhere in large cities. When we were in Madrid we used them last year and I always can see them in Budapest,...