A I am a Futurist, as well as a Past-tourist. And all these are material things..Stonehenge, Glastonbury Tor, St.Pauls, Machu Picchu, Temples in India, Mayan Pyramid etc etc.. They were all built by people.. People who also built houses, bridges and castles and cathedrals..
Preserving a scared-site-based-monument for the future..while preventing the present from having full access does not serve the future. If the energies at sacred sites are true.. then I like to believe those are `of the place’..and not of the objects placed on those places.. (am not forgetting that `invoking energies’ into an object repeatedly over time can instill a vortex of sacred energy into that object. States in Hindu temples are an example where I have actually witnessed this process!).
So even in their final crumbling moments the objects / monuments can still manifest some thing important & enlightening for all . And when they have gone to dust…(if the energies are true), something new and magical will still rise in their place.. People of the present might build new things.. And that too will be perfectly okay..
If one bunch of people/community can create something 5,000 yrs ago.. and it’s now seen & viewed as magical and sacred…. there is no reason in- my view- why another bunch of people in modern day can’t do the same..!
After all.. are we any less magical than those who lived and died 5,000, 10,000 or even 50,000 yrs ago? That is the real question under all this ..for me at least!