If I have to choose a topic, the first thing it comes to my mind is caving.
Caving has been always not just a sport but a passion. A hobby which has to hide sometimes if you do not want people thinks you are nuts. Nevertheless and under my experience, few sports can compete with caving, because is like a pack of adventures and misadventures altogether.
I have to say that is really hard to explain how many emotions you can live underground, at the moment you put a step in a cave, you are slipping in an alternative dimension. No light, no time, no sound. Just you and the darkness.
Once inside, better you know how to read your map and have the best lighting possible. Crocked passages, deep pits, sometimes pools you have to sort out, all these obstacles within a maze of galleries. The better you prepare for your outing, the better you will enjoy your journey. That is a fact and it is the difference between a successful trip or a possible rescue. Most of the caves are something serious.
Besides de cave per se, the second element not less essential is your hub of cavers. People no necessarily friends, but pals. At this point, I would like to highlight how many people can be warming friends when are taking a coffee with you and how unuseful result when it really matters, when your life hangs by a thread, indeed, when your life hangs by a rope. In consequence, better you come along with good pals, experienced cavers with cold minds who know how to act against difficulties.
And regarding the rest, the rest is pure poetry, going deep inside the wild geomorphology, feel the naked nature from its inside out. To reach the humbleness of our existence throughout the memory of our ancestors. Cave as a concept of refuge, protection, a place of solace, a universe to connect with yourself, without interferences.