Dayton Grotto Gardens is free to visit and is open 24 hours a day. I am not sure how much lighting there is at night. It is located on the property of the Dayton VA Hospital. Permission granted by the American Veteran's Heritage Center.
A series of short field puzzles for you to enjoy as you visit the gardens. All finals are located outside of the hospital, gardens, and cemetery area, but they are all less than 2 miles away. I do NOT recommend finding the finals at night.
There is a memorial on a large rock at the posted coordinates. Enter the year on the plaque into the certitue below and it will give you the final coordinates.
You can validate your puzzle solution with
certitude.
.