The world’s longest staircase is located on the face of Mt. Niesen in Switzerland, nicknamed the ‘Swiss Pyramid’ for its triangular shape. The 3.4 km staircase goes up the side of the mountain with 11,674 steps, ranging from an altitude of 700 m at the bottom (from the side of the Kander river in Mülenen) to 2363 m at the top (the terminus near the summit of the mountain). Its average gradient is a monumental 55%, with a maximum of 65%.
For safety reasons, the staircase is normally closed to the general public. But one day a year, in June, it is opened up for the world’s longest single-staircase race – the ‘Niesen Treppenlauf’, otherwise known as the ‘Niesenlauf’. During the course of this race, up to 500 participants get to climb the monster staircase at record-breaking speeds. The record for the event is 1 hour and 2 minutes for men, and 1 hour and 9 minutes for women – which is really quite remarkable, considering that reaching the top is the equivalent of climbing the Empire State Building more than 7 times.