Kalabaka was a beautiful surprise. It is a quintessential Greek small town (warm people, fresh air, amazing feta cheese beautiful architecture). Kalabaka is just next to Meteora and you'll have to stay in this town if you want to visit monasteries as there are not much staying options in Meteora. We had booked train journey in the evening and were returning to Athens. We stayed in Athens again for one night and had early morning fight to Crete.
After checking in I took walk around to see sunset. There are plenty of mountains to hike up in Kalambaka from where you can get view of whole town and more.