Postcard Sieveschlüff, Luxembourg's Little Switzerland, rock cleft

Black-and-white postcard of the Sieveschlüff in Luxembourg's Little Switzerland, published by C. Schoren, photographer at Rue Bourbon in Luxembourg City, as number 43 of the Série Müllertal. The composition looks up from the floor of the cleft: moss-covered sandstone walls rise to the left and right, and in the centre a small stone staircase leads to a narrow passage where a seated figure barely rises above the horizon. The printed caption "Petite Suisse luxembourgeoise - Sieveschlüff" appears at the bottom. The card is in good condition.

The Sieveschlüff, in Luxembourgish Siweschlëff or "seven clefts", is a rock labyrinth near Berdorf where Luxembourgish sandstone rests on a slippery marl layer. At the edge of the plateau, sandstone towers broke away and slid down the marl, creating seven clefts up to thirty centimetres wide and twenty metres deep. The cool, humid microclimate inside the crevices shelters rare mosses and ferns. The region has belonged to the UNESCO Global Geopark Mëllerdall since 2015. The reverse bears the LUX emblem and the publisher's address, placing the card in the period from around 1905 to 1920.