Trümmelbach Falls is a series of ten glacier-fed waterfalls located in the Lauterbrunnen Valley of Switzerland's Bernese Oberland region. The falls are located inside a mountain and are accessible via a tunnel and elevator system.

The Trümmelbach Falls are unique because they are the only glacier-fed waterfalls in Europe that are accessible by underground pathways. The waterfalls are fed by the melting glaciers of the Jungfrau region and are located within the mountain's rock walls. The falls carry an impressive 20,000 liters of water per second and are at their most powerful during the summer months when the glaciers melt the most.

Visitors to Trümmelbach Falls can take a guided tour of the falls and explore the underground network of tunnels and pathways that lead to the waterfalls. Along the way, visitors can learn about the geology and history of the falls and the surrounding area.

The Trümmelbach Falls are a popular tourist destination in Switzerland and are a must-visit for anyone traveling to the Bernese Oberland region. The falls offer a unique and unforgettable experience and provide visitors with a glimpse into the natural beauty and power of Switzerland's glaciers and waterfalls.