Suggestions for 6 days in Eastern/Central Europe (Hungary/around there)
I will be working in Budapest from Tuesday June 2nd night through Thursday night June 4th. Can arrive on Sat May 31st and leave on Monday June 8th, so besides work will have about 5.5 days left for sightseeing vacation etc.
Asking for suggestions of other places to visit either in Hungary or Central Europe. I have been to Vienna for 4 days, Budapest for 3, Lake Bled for 2 and also visited Prague, Krakow, Sarajevo, Mostar and the coast of Croatia before.
My thoughts are use the days to travel around hungary and visit other places there, or possibly go to Slovakia or Romania or northern Serbia (seems like the places that are close by). Of course given that I could fly if needed can extend a bit further too.
Suggestions appreciated, for places to visit (any can't miss places) beyond Budapest. and also transportation suggestions (I am comfortable driving in Europe, have done so in Croatia, France, England etc)