4K Waterfall Nature Sounds from Croatia's Plitvice Lakes National Park. This 15 minute waterfall sound track in 4K UHD is excellent for sleep, meditation, studying, and anxiety. With the help of relaxing water sounds, fall asleep quickly. 15 minutes of peaceful waterfall and natural sounds. White noise to aid with sleep. Sleeping, meditation, focus, studying, calming the mind, stress relief, relaxation, and other activities may benefit from the soothing sounds of running water.