[Phemist]

To see what an x-metre sea drop looks like - https://what-if.xkcd.com/53/

[legulere]

There used to be a place called Doggerland in Europe: https://en.wikipedia.org/wiki/Doggerland

[DrScump]

The 200 and 500 metre maps show the Netherlands conquering much of Europe. That seems just rude.