Guess the map....

[Doctor Phibes]

No peeking...

[Mik]

Sharknado attacks?

[LuFins Dad]

Places stoned people fell off of boats?

[Copper]

Spitfires turned into submarines.

[LuFins Dad]

I think it’s a map of the British Isles and Western Europe with the waterways in between and some pink spots.

What do I win?

[Jolly]

Oil rigs?

[Renauda]

Too far south for rigs.

Nor do I think it demarcations of downed Luftwaffe aircraft.

[Doctor Phibes]

Well done everybody in avoiding Dutch dyke jokes.

Spitfires is the closest. It's unexploded bombs.

Sadly, German engineering being what it was, they frequently still work.

https://www.bbc.com/news/uk-england-67946213