Things/towns in the Prague-region to do?

Hi all. Last full day in Prague tomorrow. I’ve explored the Old town and been to Prague Castle. As well I’ve been to Kutna Hora for a day where I saw the Sedlec Ossuary and Saint Barbara’s, and Karlovy Vary. I’m looking for maybe a town within 1/2 hours that’s cool to see, or something in the city if there’s enough to do. I’m into anything, just have spent 2 full days in Prague already and feel like I’ve seen enough to be happy with my visit and like seeing smaller towns. I have a whole other week for the Adršpach and Moravian region, so nothing in that area please. Any recommendations? Thanks!!

Things/towns in the Prague-region to do?