At Lauterbrunnen the water does not come over the top of the cliffs but out of the middle of them, seventy-two waterfalls over a flat green Swiss valley barely a kilometre wide. The walls are 400 metres high, and the water arrives in mid-air because a glacier once filled this valley and cut it far deeper than the side valleys feeding in. When the ice went, those streams were left hanging on the new cliff face, and they have poured off it ever since. The biggest is the Staubbach, 297 metres of near-freefall behind the village. It falls from so high that the wind takes it apart before it lands. A paved path climbs fifteen minutes to a gallery cut into the rock beside it, where the spray drifts over you. J. R. R. Tolkien walked through in 1911, and the valley's name went into his books: the river of Rivendell is Bruinen in Elvish, Loudwater in English.
A flat lane runs the valley from Lauterbrunnen to Stechelberg, through meadows and hay barns, past the foot of one fall after another. Halfway along, the route goes inside the mountain: at Trümmelbach a lift bored through the cliff climbs to a gorge where ten glacial waterfalls off the Eiger, Mönch and Jungfrau pound through the rock. A cable car and a mountain train lift you to Wengen, car-free on the terrace above, where the whole trench falls away and the falls shrink to silver threads. The same cliffs have made this one of the busiest BASE-jumping valleys anywhere, fifteen to twenty thousand jumps a year, and on a clear afternoon you can pick out the figures dropping from the rim. From Mürren a cable route runs downhill along the cliff to Gimmelwald, three hours clipped to a wire. Midway it crosses the Mürrenbach ravine on three steel strands near the top of the fall — 417 metres, the highest in Switzerland, going away under your boots.