Gadling

The caves in Spain are famous for their variety and extent. Some delve more than a kilometer into the ground. Others are adorned with prehistoric cave art more than 10,000 years old. Almost all have beautiful rock formations. There’s a whole other world under the one we usually see.

As I mentioned in a previous post, I’m taking a course on caving. My first experience was in Cañuela cave, an easy cave suitable for beginners. Last weekend we went to Coventosa in a remote valley in the Sierra de Cantabria, a tougher cave system that requires more rope work.

The first challenge is what you see in this photo. Here I am worming my way into a little tunnel that slopes down at a steep angle. As you can see I’m tied in with a pair of carabiners attached by ropes to my harness. Why? Because at the end, the tunnel opens out onto the edge of a cliff. Start sliding uncontrollably down this tunnel and you could fly right off the cliff, fall ten meters and smash into a bunch of jagged rocks.

Coventosa is an active cave with some amazing formations. Water seeping through cracks in the rock leaves mineral deposits that harden into stone. Over vast periods of time, these accumulated deposits create stalactites, stalagmites, columns and other formations. Several walls were full of shellfish fossils, evidence that the area was once underwater. Exploring caves gives you an appreciation for how incredibly old yet constantly changing our planet is.

%Gallery-183046%Normally as the water drips down it will create a stalactite hanging from the ceiling. The water hits the floor below, leaving more deposits to create a stalagmite rising from the ground. Eventually these two features will meet to form a column.

If the water is dripping more slowly, sometimes instead of a stalactite you’ll get a soda straw, which looks exactly like what it’s called. These tend to hang straight down or at a bit of an angle if the water is pushed by an air current. Some soda straws eventually turn into stalactites, while others cling to the side of existing stalactites and grow at crazy angles, with the water seemingly defying gravity. There are various theories as to how this could happen, which means that scientists really don’t know what’s going on. We still have a lot to learn about our world.

Caves are one of the last frontiers left to us for exploration. New caves are being discovered every year, and additional tunnels in existing caves are being explored regularly. Caving is pretty much the only way a regular person can discover a previously unseen part of the world.

While I’m years away from that level of skill, the caves in Spain are already giving me a taste of that feeling. How many people have been to the Beach, a stretch of sand next to an underground lake so large that it defied my attempts to photograph it? Or visited the Ghosts and the Virgin Mary, a cluster of eerie stalagmites in one of the deepest parts of Coventosa Cave?

Then there was my favorite, a low gallery with a forest of columns half submerged in water. Our lights couldn’t penetrate to the far wall. As we crouched there, one of the students asked how far it extended. The instructor said it didn’t go much further than we could see and was sealed off by a rock fall at the end. That made me wonder – what if we took away the rocks? Was there a tunnel on the other side? Where would it lead?

Passing between these sights got tricky at times. On one cliff we had to tie into the rope, get around a difficult outcropping, then secure our protection to a second rope. Going up that same route was even more difficult and a couple of us (myself included) made the rest wait as we fiddled around trying to find the best way to do it.

While caving can be physically demanding, it requires more balance and focus than pure strength. The best student in our class is a young woman who is a foot shorter than I am, who flies up and down the ropes with far more ease, and an obvious natural talent. This is a sport that any reasonably fit person can do.

Even so, by the end of the day we were all worn out. As we emerged from the cave entrance we were greeted by the deep blue sky of evening. We’d been in the cave for nine hours and the day had passed us by. Jupiter and a crescent moon shone high above the peaks. In that other world you lose track of time. Now that I’m back in the regular world with its sky and its clocks, I’m marking time again until next Saturday, when I’ll try an even more challenging cave.

[Photo by Dani]