Швейцария
The Trümmelbach Falls are located in the Swiss Alps, on the territory of the municipality of Lauterbrunnen. They are a series of 10 cascades passing inside the rock massif and collecting the waters of the melting snow from the Eiger (3970 m), Mönch (4099 m) and Jungfrau (4158 m) peaks, with a catchment area of 24 square km. Until 1877, all but the lowest falls were hidden and inaccessible in the interior of the mountain. That is why the name of the waterfalls describes not an optical, but an acoustic image - Trümmel = Trommel, which means "drum".
In different seasons, the amount of water fluctuates significantly: from December to March, a small stream flows under the ice "armor", after the icy nights in April and October, only a few tens of liters per second flow, while during the snowmelt from April to June and the melting of glaciers from June to September pour up to 20,000 liters per second through the rocks with a great roar and thus the Trümmelbach turns into a river.
In the period 1877 - 1886, stairs and bridges were built in the tunnels of the lowest waterfalls. In 1913, a tunnel lift (cabin rope funicular with a counterweight) was built to the 7th waterfall, and the access to the three uppermost waterfalls, which is a staircase with a gallery and an observation deck, was completed in 1986.