BTW, for those who get the transit pass, Budapest has second oldest subway in Europe (oldest on the continent), and a ride on the old section is WAY cool IMHO (I am a rail enthusiast, so I may be biased
).
It's short, only a few stops and barely below ground, not like today's lines that are way below ground. Moreover the stops are so close together that you may think why bother, but it's just fun. Worth a trip even if you don't get the day pass.