Caves seem to give off the most other worldly feeling when you enter them.  One will almost immediately have a sense that there is “something else” with them after they enter into the darkness of the cool caverns. 

I know, for myself, that a cave is one of the few places on earth I feel uneasy entering alone.  Even if there are others spelunking about, I like to have someone with me whom I am personally acquainted with; someone who has my back, because I will inevitably get an eerie sense that some unidentifiable something or other is pacing itself deliberately behind me.

Spelunking: the sport meant to bring out the paranoia in all of us. It’s the next best thing to watching ...