Yes, sometimes we change it beyond recognition into the unnatural.

But remember that humans evolved within nature, and are part of nature.
The human mind is after all, a natural organ! I believe that it's human nature to facilitate access to these beautiful places, and so long as it's not destroyed, then allowing more people to see this beautiful sight only enhances it's natural beauty by allowing others to experience it!

It makes me wonder if the fields and forests are still natural with houses in them? And I think yes! Because human structures are like those created by ants, we just are better at shaping our world than the ants :)