5 days in poland

Go to Zakopane (mountains not far from Krakow) if you like to hike. You can easily spend two full days in Krakow and another half day at the Wieliczka Salt mines.

Download the Krakow In Your Pocket guide to get a good feel for all attractions.
https://www.inyourpocket.com/krakow

Kraków was our favorite city In Eastern Europe. Wish we had more time there. Stay in Kraków, visit the salt mines.

Not too far away and with a reasonably frequent train connection is the attractive provincial town of Tarnów. Check this timetable for the schedule.

Exactly, tomfromleiden, when I was in Krakow in 2001, I saw the name "Tarnow" on the train platform, the next local train was going there. I had forgotten (historically) how close Krakow and Tarnow were distance wise, would have been delighted to see that town as a day trip for a few hours. Our schedule was packed.

A lot depends upon stops before and after. Krakow is not the easiest place to get to/from, and based upon my research it has a lot to offer. I could easily see three full days there. That's what I am planning on a future Krakow to Berlin itinerary (maybe this fall!). Wroclaw is another city well connected to Krakow by train, but I was thinking about that as a place to stop between Krakow and points west. I would seriously consider just extending your stay in Krakow, even though it might be a day more than needed. It's just not that well connected to any place else that is that interesting (this is strictly based upon my own research, others may know better).

"...what else we can do/see in other 2 days?" Walk all over the center and old town, the Wawel castle, explore the Rynek ( I went back there 3 times), the visit we had for 4 nights was too short. If you tire of Krakow, go out to one of the towns west and south of Katowice.

It's just not that well connected to any place else that is that interesting (this is strictly based upon my own research, others may know better).

I respectfully disagree with that statement. Warsaw is interesting and an easy train trip. Also, Krakow is close to Częstochowa (mostly for Catholic pilgrimages), Tatra mountains, Slovakia, and not too far from Lviv, Ukraine or Wrocław, Poland (but I wouldn't try to see either Slovakia or Lviv on a 5 day trip). You can also see old wooden churches (UNESCO sites) if you rent a car - it's not hard or stressful to drive there but some of the roads are small, two-ways.

There are tours that go from Krakow to see the wooden architecture churches. The old churches were a favorite on my last trip!

Hi Apyfiz!

When you have so little time then:
Combine tour to Auschwitz with a short stop in Wadowice, birthplace of John Paul II, where you can take a second breath after Auschwitz and think about concept of love in the world while eating Pope's creamy pie

When in Krakow hire a bicycle - if you like such kind of transportation.
Take the tram to get to the other parts of the city - like Nowa Huta. It's faster than car! :)