Krakow. What an amazing place that is (I spent 5 nights there, but could have stayed longer),with side trips to Auschwitz, Wielicka, maybe even the the nearby Ostrow National park featuring an eagles nest castle, other monasteries, even to go as far north as Czestochowa.
It's just a great city to walk around. Very safe and calm, and totally beautiful and very mysterious looking.
Wht time of year?
4 days Krtakow and 3 in Warsaw with train between is just right.If you had more time then there are other places well worth visiting too.
definitely Krakow. Warsaw can be even visited in one day from Krakow if you take a guided tour and from Krakow you can easily visit Auschwitz, Wieliczka Salt Mine, Zakopane, Ojcow National Park, Czestochowa and some other religious sites, even take an excursion to Slovakia
Warsaw can be even visited in one day from Krakow...
...and Kraków can be visited as day trip from Warsaw if you insist. The quality of such sightseeing will be appropriate...
Actually Warsaw is even worse suited for one-day sightseeing than Kraków, which is much more compact. 2 days in Warsaw is a minimum, 3-4 days are enough to properly appreciate the city. Going for to Warsaw for one day makes no sense at all.
