In a word: Awesome!!!!!
It is Mother Nature at her best! The name Trümmelbach literally means "stream that sounds like a drum". And how! The din that's created by the draining of the enormous glacial walls of the Eiger-Monch-Jungfrau massif, with up to a speed/volume of 20,000 litres per second!
There are 10 glacial look-out points inside the mountain that are accessible by a tunnel lift which rises about 100 metres in 60 seconds. It can carry up to 40 passengers at one time with up to a capacity of 500 per hour. It is a technological feat in itself. Constructed in 1983, it is a continued effort first started by the Von Almen family who in 1913 first built tunnels, stairs, and bridges to allow for visitors to enjoy this tremendous work of art.
To get to Trümmelbach Falls by car from Berne/Basel/Zurich/Geneva, take freeway N6 or take N8 if you are coming from Lucerne/Zurich. Near Interlaken, take the Wilderswil exit and continue driving toward Wilderswil and Lauterbrunnen. About three kilometres after passing through Lauterbrunnen, you will arrive at Trümmelbach Falls.
If you are going to Trümmelbach Falls by train, go via Interlaken (SBB/BLS/Brünigbahn) toward Lauterbrunnen (BOB). A bus will take you from there to the Trümmelbach Falls bus stop.
The Trümmelbach Glacier Waterfalls are open from 9am to 5pm daily from April to November and from 8am to 6:30pm in July and August. Phone: +44 - (0)33 - 855 32 32 / Fax: +44 - (0)33 - 855 32 33.