Hikers build these cairns to mark the trail they are on ... this is mine. mansion built of native rock in Lake of the Ozarks, MO https://dutchgoesthephoto.net/2017/11/28/tuesday-photo-challenge-build/
water tower, Lake of the Ozarks stone wall closeup mansion wall https://ceenphotography.com/2017/10/26/cees-black-white-photo-challenge-bricks-or-stones/
https://nadiamerrillphotography.wordpress.com/2017/10/19/a-photo-a-week-challenge-hidden-treasures/ The abandoned mansion at Ha Ha Tonka State Park near Lake of the Ozarks, MO. It's a fairly short-ish hike/walk, but what is left of the structure is really imposing.