Coolest functioning tram/tour bus?

I was in DC seeing the sights with the lady this week, and at Arlington National Cemetery I came upon this awesome old-school tram. It's no Red Bus, but it got me thinking - what's the coolest tram/tour bus still in use today?

Coolest functioning tram/tour bus?

Bonus "Would You Rather?" pic from the H Street Corridor. I'd take the Corolla, then smash it.