I grew up in Hams Prairie and have lived in the area all my life. I have always heard stories about dark hollow, but have never seen anything that would make me believe there is anything going on there. We used to party down there at night and it was kind of creepy but thats all. A buddy of mine and I had to walk out of there at night once when the girls we were with decided to play a prank and leave us when we got out to pee. Like I said, creepy but thats it.The pics you posted of your trip dont show anything out of the ordinary that I can see either. The strange building is actually an old jailhouse in Mokane. We used to play in it when I was a kid. The cemetary on Hwy O is actually on Hwy CC on the hill above Steedman. My grandfather,uncle, and aunt are buried there and I probably will be too. I'm open minded about this stuff, but its gonna take some hard evidence or a personal experience to make me believe.