The pyramid 'hats' are erratics, large boulders transported and deposited by glaciers during the Würm glaciation.
The base material is a mixture of gravel and clay, which becomes unstable when exposed to rain, leading to the sharp vertical sculpting of the pillars.
The road was originally carved through the base of the formations, allowing visitors to drive directly between the towers.
These formations are officially protected as a Swiss natural monument of national importance.
Over time, once the protective cap boulder falls off, the supporting pillar erodes and disappears relatively quickly.
The Pyramides d’Euseigne are rare geological formations known as earth pyramids or hoodoos located in the Val d’Hérens. These natural pillars consist of moraine deposits left by retreating glaciers during the last ice age, capped by large boulders. The boulders act as protective umbrellas, shielding the softer underlying material from erosion while the surrounding sediment washes away. They are some of the tallest and most well-preserved earth pyramids in Europe. The site is situated directly along the main road leading to the resort village of Les Haudères. The formations rise up to 15 meters in height and continue to evolve due to ongoing natural weathering processes.
From the pedestrian walkway along the side of the road that runs through the pyramids.
Pull into the designated parking area adjacent to the site to view the formations safely away from the main road traffic.
Bring a wide-angle lens, as the pillars are tall and close to the viewing path.
Check the stability of the terrain if you choose to explore the small path leading uphill near the formations.
Do not attempt to climb the formations, as the sediment is loose and fragile.
