This was our 4th country visited on a 2.5 month trip. Similar to Romania and Bulgaria prior to this part, we didn’t do much advance planning.
Overall, we enjoyed historic towns, sights, history, wine, and especially nature with hikes in and around the Tatra mountains. We had a rental car for the duration of the trip which seems mandatory to explore the country. Highways and 2-lane roads were all in very good condition.
Lodging, food, and wine were all reasonably priced. The Tatra mountain lifts were somewhat expensive, and getting to them required paid parking in the small towns. The nature sightseeing seemed somewhat busy with domestic visitors (and some neighboring countries) while other US/western tourists like ourselves seemed rare.
I found the written language to be quite a challenge resulting in a mis-directed town hotel reservation, and also lots of confusion/map studying trying to sort out the different hiking areas of the Tatra range.
Based on our trip (and copying Steve’s rating system with ^ for ratings) this is how we summarize what to see/do:
^^^ Tatra Mountains (1-3 days) Small mountain range with a good system of lifts to access views and/or many hikes. The entire area can be done by bus and/or small trains.
^^ Slovak Paradise (Slovenský raj National Park) (½ day + travel time) Challenging but fun series of ladders and walkways to hike up a creek gorge.
^^ Spis Castle (2 hours) Large sprawling castle grounds with good views of the area.
^^ Košice (1 day) Some interesting sights to see best done by walking tour.
^ Banska Bystrica (1-2 hours to see town, 1-2 days for nearby sights) Small city which can be used as a base to explore other areas (which was not initially our intention).
^ Banská Štiavnica (1/2 day) Sprawling historic center on hills. May be good for an overnight.
^ Trenčín (1 day) Yet another quaint town with an enjoyable historic center and a hilltop castle.