Have you ever explored an abandoned place?

Yeah, I am fascinated with old motor inns and I have explored some abandoned ones, you really have to be careful, snakes,street people living in them,plus walls that fall and such. Went into one abandoned motor inn lobby once and found a book on the floor containing people that frequented the place's names and addresses, I left it in a drawer, I was gonna destroy it,but I thought about it, the addresses and names were from the mid 1960s and there was no financial risk information,so I just left it in it's tomb.