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.
Grotto Memorial Fountain. Enjoy the fountain in the middle of the lake. Enter the year on the plaque that the fountain was dedicated into the below certitude in order to get the coordinates to the container.
You can validate your puzzle solution with
certitude.