Working underground

Good morning ,

I work as a Civil Engineer , specializing in tunneling , Most of our work is taking place underground , working underground gives you a unique feeling which is a combination of fear and strength , the reason behind this feeling is because you know that you've reached a place where only a few people can reach , some times we reach 50 meters depth or more , it's where the pressure changes and you may feel dizzy due to the lack of Oxygen but you have to continue because you have no other choices , For me i find it very interesting , once i enter the tunnel i have a unique feeling of relief because i leave all my problems and bad feelings up there on the surface and go down deep underground where no body can reach you .