This region is scattered with large boulders and rock formations, I thought this one looked a little like a snail. Located on the trail PR3 “Trilho Castrejo", Castro Laboreiro, Parque Nacional da Peneda-Geres, Portugal

D200
AF-S Nikkor 55-200mm 1:4.0-5.6G
Location: 42° 1’ 11.37" N, 8° 10’ 9.25" W ➔ Estr. CM1160, 4960 Melgaço Municipality, Portugal