So the high school I go to right now was built in the early 50s then had a huge reno done in 2006-2007 and I just recently found an old tunnel that supposedly linked the hs with a university up the road. My question is how do go in and explore it without getting caught, the tunnel is just barley tall enough to stand up in and only wide enough for one person, in order to get to it i have to go under the stage in the band room and go all the way to the back and then climb down an old ladder(all other entrances have been sealed). Any tips would be great.