A while ago @aweber (in his former, less bearded, state) and I had the opportunity to explore this abandoned mill located just north of Columbus on the banks of the Olentangy River. It's an impressive skeleton of what used to be a functioning gristmill until a fire destroyed everything but the stone walls. If you're ever in the Central Ohio area I would highly recommend giving it a visit and snooping around a bit.
Windows to the World (I'm so impressed by this stonework, it's still beautiful even after surviving a fire)
Window Peepin'
Creeping Vines
Looking out on the Olentangy
A-door-able Andrew
For more information on Beiber Mill check out this webpage: https://goo.gl/nsKT53
Hope you enjoy! Thanks for reading.