Re: "would you go down an old mine, cave or drain pipe"
I did a fair amount of caving in years past— mostly crawls, not vertical— back in the Arkansas Ozarks. It's easy to get lost or disoriented unless you pay close attention, and of course there are all sorts of potential problems: falls, entrapment, sudden flooding, and (near the entrance) copperheads and rattlesnakes. (The threat of rabid bats is overstated, although it shouldn't be ignored.) I love caves and have explored my share, but I also have a healthy respect for them. If you go alone or unprepared, or don't stay totally focused, things can go wrong in a hurry. For the most part, I'd recommend staying out of old mines, as they're often very unstable, and some have pockets of lethal gases as well.
I did a fair amount of caving in years past— mostly crawls, not vertical— back in the Arkansas Ozarks. It's easy to get lost or disoriented unless you pay close attention, and of course there are all sorts of potential problems: falls, entrapment, sudden flooding, and (near the entrance) copperheads and rattlesnakes. (The threat of rabid bats is overstated, although it shouldn't be ignored.) I love caves and have explored my share, but I also have a healthy respect for them. If you go alone or unprepared, or don't stay totally focused, things can go wrong in a hurry. For the most part, I'd recommend staying out of old mines, as they're often very unstable, and some have pockets of lethal gases as well.