There is a concept in US/Canada about historical sites that are considered special, and part of the history and heritace of the people, they are occasionally called national parks, provincial parks, or for very small sites, Cultural heritage sites. So, as far as the existing hardware, the things and footprints that are there, that represent our history, that represent those that came there before us - If it was made by people, we don't touch it unless asked by the owners. We do not support anyone else touching it either.
As far as Culture, the expression and communal experience - the other definition of cultural heritage, we say - bring it on. We do not discriminate as long as your rights or expression do not in any way, interfere with the liberty of another. Sing your song, pray to whom you will, but harm no one.