My new Place template has a good default centre of the #map: https://archives.org.au/Template:Place (it's just a side effect of using the first search result, which is https://www.wikidata.org/wiki/Q535663 ).
This is a Mastodon instance primarily for Australasian Galleries, Libraries, Archives, Museums and Records people, and anyone else who wants to hang out with them. We use the Hometown fork which enables local-only posts.