On your second day, venture into the beautiful natural surroundings of Belluno. Start by visiting the Parco Nazionale delle Dolomiti Bellunesi, a national park known for its breathtaking landscapes and hiking trails. Explore the park's trails and enjoy the stunning views of the Dolomite Mountains. If you're feeling adventurous, you can also try rock climbing or mountain biking in the area. Afterward, head to Lake Misurina, a picturesque lake surrounded by mountains. Take a leisurely walk along the lake's shore or rent a boat to explore its crystal-clear waters. In the evening, relax and unwind in one of the cozy mountain lodges in the area.