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Photo: via Wikimedia Commons, CC BY-SA 3.0
This 13th-century castle of Gothic-Renaissance style is placed in a town of the same name. Nowadays, a museum of dolls and toys can be visited here.
© OpenStreetMap contributors
Many thousand years ago, this was one of the biggest Earth's strato-volcanoes, with diameter approx. 18 km. Nowadays though, it's completely forested and suitable for easy hiking.
"Nízke Tatry" / Národný Park Nízke Tatry
Skiing, multi-day hiking and caves.
Pretty ravines and great overview from the top of the main mountain.
Peaks like Veľký Rozsutec, or ravine Jánošíkove diery make this area very worth the day or two of stay.