I think you've got a pretty good start for the lead section. I think it could possibly be shortened and more broad in terms of information. A suggestion I have would be to place the information about the nearby sites in another paragraph, possibly in a section dedicated to an in depth description about the location. Personally, the sentences about the other sites in the introduction takes away some of the focus from the main site, which the introduction is meant to focus on. But the information about the other sites does give you a bigger picture about what the location is like, which is valuable information, hence my suggestion to place it in its own paragraph in a different section. All of the rest of the introduction gives a nice overview of the site and helps give me insight as to what the rest of the article is going to be about, which is great!