The waterfall of Môtiers and its cavern as well as the so called toblerone line are located at the entrance of the hiking trail to the gorges of Poëta-Raisse, ten minute walk outside of Môtiers village. It’s an easy walk, and a real treat for cavers. The toblerone line is a defensive line made of so called “dragon’s teeth”, built during WWII. The main purpose was to stop tank invasions. Now, they are in a perfect symbiosis with nature.
https://goo.gl/maps/F344KHTXHYJS3vWv8
https://www.j3l.ch/en/P48574/motiers-waterfall