This is a very ooooollldd map I started and never finished . I don't think I'll work at it anymore so here you are . Poor arhitecture and those things .
Well , just try it , maybe it will give you ideas
Of course , credit me if you modify it and publish it . I don't want any special credits , you made the map if you modify and work at it
Anyway i "walked" through the map in hammer and didn't see anything all that exciting, but i tried it like you asked in the description so there! = )
p.s. what is the big pole in the middle do/for?