Jasna Lake is a small artificial lake that got its name from two connected lakes at the confluence of the small and big Pišnica Rivers. At the lake, you might hear a legend about the Goldenhorn, from whose blood grow the nicest flowers in Triglav National Park–Dolomite Cinquefoil (Potentilla nitida).

The legend goes that Goldhorn's golden horns were the key to a treasure hidden in the mountains around Triglav. A young and brave hunter from the Trenta Valley fell in love with a beautiful girl and managed to win her heart by bringing her beautiful flowers. However, one day a rich merchant from Venice came by and tried to gain her attention by giving her golden jewellery and dancing with her. As the hunter approached the girl, she mocked him. The hunter was desperate and left. Persuaded by another hunter, called the Green hunter, who was said to have brought about the fate of several honest boys, he decided to go that very night to find Goldhorn and claim his treasure. In the morning, they found the animal, shot it and pursued it. The dying animal dragged itself onto a narrow, rocky ledge. Suddenly the boy saw on a dangerous trail the most beautiful and healing flowers. The Green hunter forced him on to catch the Goldhorn before it ate the magic Triglav flowers that grew from its blood, but it was too late. The Goldhorn had already eaten one and the flower gave it tremendous life power. It ran towards the hunter, who being blinded by the bliss of its golden horns lost balance and fell from the mountain.