Any suggestions on a day trip from Lucern?
Zurich's Rhine Falls. Mt Pilatus, Rigi Kulm...or just stay put ;-)
A round trip - sail on lake cog railway up Mt Pilatus, gondola down and bus back Lucern. But with two nights you could spend the time wandering the town- see the Rathaus and other old decorated buildings. Walk the wall. Walk along the lake and see the swans. See the mercenaries' lion monument. Admire the jewelry stores. Cross the Kappelbrugge and the Devil's bridge. Have dinner outdoors by the river. Plenty to see and do in the town.
definitely take time to see the town- sights as suggested above
Mt Pilatus. A real neat ride up. Best on a clear day of course.
Kim, not sure when you are going but I was at Mt. Pilatus last week and there was a lot of snow up there, couldn't see a thing. So don't waste your money if it's not clear. Transportation museum is good to do also, if it's raining. Don't forget to do the City Walk too! Have fun!