"All waters are brooded over by Nârâyana, but every kind of water is not fit for drink. Similarly, though it is true that the Almighty dwells in every place, yet every place is not fit to be visited by man. As one kind of water may be used for washing our feet, another may serve the purpose of ablution, and others may be drunk, and others again may not be touched at all; so there are different kinds of places. We may approach some, we can enter into the inside of others, others we must avoid, even at a distance."
These places being referred to, are not physical places. They appear to be places of the mind (perspectives). Fore different perspectives, even of the same place, yield different information. I cannot think of a physical place that is more harmful than the perspective that manifested it.