Ash Cave, Hocking Hills State Park in Ohio.
“Live in each season as it passes; breathe the air, drink the drink, taste the fruit, and resign yourself to the influence of the earth.”
Henry David Thoreau
Live And Breathe
Make the Journey Fun
You'll be as happy as you make up your mind to be
Make the Journey Fun 
I didn’t see the people at first and really misjudged how big that is! Very cool picture.
It really is enormous!