Comment by peteri

For the UK the Scottish national library has a similar map finder.

https://maps.nls.uk

With a bit of a london focus (since that's where I live)

https://www.layersoflondon.org/

https://mapco.net/

https://mapoflondon.uvic.ca/agas.htm

Finally this site:

https://www.oldmapsonline.org/