This is on the Frommers.com website:
"Seniors are normally entitled to reductions at museums, galleries, and castles. Usually the reduction is half the standard admission price for people aged 60 or over, though some attractions only discount above age 65.
Seniors (over 60) pay half price on Prague metros, trams, and buses. To get the senior discount, simply produce your passport at the ticket window and say "senior." Often you can get the discount simply for asking for it without having to show any documentation."
Can US citizens get this discount? I thought that it was only EU citizens. If we can get it, will a driver's license be okay to show? I don't like to carry my passport while I'm sightseeing. Thanks to all!