We went walking through the Redwoods last weekend. It’s not surprising that certain groves of trees have been revered as sacred all over world since the beginning of time. They seem to be gateways to the unseen world around us.
The groves were God’s first temples. – William Cullen Bryant, A Forest Hymn
markbartels.org 
Yes, those are amazing cathedrals open to all, faith or no faith. John Muir of course also said the forests, and mountains, were temples, sanctuaries for all people. Happy walking.