So this is probably already posted about, but in the rural Wisconsin region while hiking I found this cool little cave thing off to the side of one of the trails. I went inside, and found it was really cold and eroded, but still snapped some photos and moved on. I'm trying to convince some friends to come back with me but they think I'm crazy for going in there in the first place haha! It was in a very random spot, and I am so curious to know why on earth it was built or what purpose it used to serve, but in the meantime, exploring it was a lot of fun, and a good way for me to dip my toes into the waters of urban exploration!