Spend your day at Lake Bohinj and hike up to Mostnica Gorge. We started our day with a walk around the lake, it’s about 12k and has beautiful views. We did a picnic lunch around the lake and walked in the afternoon to Mostnica Gorge. It are waterfalls and takes only 30min to walk there from Lake Bohinj. After visiting Mostnica Gorge we came back to the lake to cool down in the water and watch the sunset.