In Judges 15 Sampson hid from the Philistines in a cleft of a rock.
In Exodus 33 God placed Moses in a cleft of rock.
The Old Believers in Romania are called "Lipoveni" which means "those who live or hide among the trees".
Old Believers in the Ural Mountains lived in these caves.
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Even if we find such a place we might be faced with enemies finding us again. I believe it is a good example to do all we can to get away from the wickedness, even if they catch us. To do so is actually the most beneficial thing for the soul, we will be stronger without the bombardments of this world. Later on, if we then face the world again, we will have more success. Christ retreated to the mountains every night, should we do less?
There is also the Four Sacred Caves of Christ.
Forgive