>>767777I too have explored the Carolin. We had 7 flashlights, an entire box of batteries, food, water, and a first aid kit. We also had someone who knew when we would phone, so in case something happened they could call it in. Exploring mines is not casual business. OP I ran into you in the /ccg/ on /o/.
Anyways, I'll dump a few pictures of other mines I have explored, none of the pictures I took inside the Carolin are any better than whats already been posted.
This mine is located on Texada island, it was a copper mine active in the 1930's and 40's. It was quite small and took about 20 mins to explore.