<span>https://netforum.avectra.com/eweb/DynamicPage.aspx?Site...GeographyStandards
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Pretty sure it was Galileo
I think the answer should be the <span>Mesosphere. It is the lowest solid mantle.
Hope this Helps! :)</span>
Claiming it as a historic item (which it is) through a document prevents common people to be affiliated with harming it. So by saying it is of significant history, citizens and tourists will not be able to do anything to jeopardize the natural landmark
