Do you dare to discover the tunnel of the Sumidor? The Sumidor tunnel is the most important cavity in the world in karst slopes and represents a provisional slope of 205 m, in a distance of approximately 1300 m, which makes it the deepest cavity in the Europe of those developed in gypsum. The entrance to the tunnel is located in a small depression at the head of the Penyó ravine, next to the river bed itself. What are you waiting for? Come and enjoy and discover new underground worlds with Grieta Adventure.
# Services included
- Technical material neededtocarryouttheactivity (neoprene, booties, headlight and helmet)