cheerful and fresh summer scene of the landwasser viaduct with a red train amidst blooming wildflowers and vibrant green

landwasser viaduct world heritage switzerland train express swiss bernina europe glacier travel landscape aerial mountain old alps tourism unesco bright sunny summer red lush green trees wildflowers blooming clear blue sky cheerful fresh vibrant scenic nature outdoors iconic beauty picturesque adventure journey warm environment photography natural seasonal greenery alpine joyful colorful inviting summertime dynamic peaceful ai generated