What are you looking for? How experienced are you as a hiker? Are you interested also in the history of the region? There is so much to see and do there for all levels of difficulties.

Today I watched people go apnoe diving in a frozen lake. They drilled holes into the thick ice and then dove from hole to hole. You can have an easy walk, but you can also do a multi day hike with via ferratas in 800m high vertical walls. You can walk around the tre cime, or you can climb to the summit. Just to give you a perspective of the options you have.