Not a huge fan of the overly-processed HDR look, but I love some of these pictures. The most important note to me is this:
I quickly realized that everyone else with a camera in this area was also shooting the exact same scenes. I really wanted to shoot scenes that other people had not already shot.
That is a key realization and is applicable to all creative outlets. Sometimes, the easiest way to set yourself apart is to do something no one you know is doing.
And then, there are two ways if setting yourself apart - either you do something unique and beautiful or you create something unique and ugly :) With HDR processing these abandoned places no longer look abandoned. But I believe it's not only about technique because hdr photography itself is nice but because of poor skills.
If you like this, you'll love /r/urbanexploration — lots of good pictures and stories!