[lm28469]

Mecklenburg Lake Plateau is the only one under 200km though, anyway, it take some preparation to do that kind of trip.

Baltic Sea = 200km to the first coast

Saxon Switzerland = 250km

Harz = 275km

[xaedes]

I measure geographical distance using google maps starting from Berlin (52.515277, 13.405301):

The german part of Saxon Switzerland is at most 200km. Distance through Dresden up to German-Czech border is 200km.

German coast of Baltic Sea is 200km, yes.

Brocken, highest "mountain" in Harz, and more or less its center, is 206km away.

Another nice area for canoeing or hiking is Jena/Naumburg(Saale) 200km south-west-ish.

Your distances are probably more useful though, when you want to get there, as I suspect them to be travel distances.

[lm28469]

Ah yes indeed, I'm talking about traveling distance, I'd love to be able to fly there in a personal helicopter though.