artificial alpine reservoir lake zoccolo zoggler-stausee and mountain range at ultental, south tyrol

forest landscape ulten adventure alpine lifestyle alps beautiful holidays mountain range mountains outdoor panoramic peaceful scenery season south tyrol southtyrol tourism traditional travel trees vacation suedtirol lake water summer sunny zogglerstausee zoccolo reservoir st walburg kuppelwies dam wall hiking trail cycling swim artificial ultental bark beetle scolytinae environmental damage issues pest bug danger