
Sandstone in the east, shale in the north, castles between the villages.

Three days across the Luxembourg Ardennes on schist ridges above the Sûre, from Ettelbrück to Kautenbach.

Six days through Luxembourg's Little Switzerland on the 112-kilometre Mullerthal Trail: sandstone labyrinths, mossy stream valleys, waterfalls and castles, on a Leading Quality Trail of Europe.