LOL! How predictable...
You can't tag that as a "Catholics only" phenomenon.
Is there really a huge difference with a 'spiritual experience" in front of some old stones and a spiritual experience in front of a window or pancake or a statue or in the the grotto ?
Of course it is not a Catholic only experience the flesh always wants an idol of its own making one that they can tell what to do and how to work
"If you know how not to pray, take Joseph as your master, and you will not go astray." - St. Teresa)
If one does not know how to pray maybe there is no indwelling Holy Spirit to lead them :) Christ has to be our Master to have that indwelling Holy Spirit