[zeestephen]

The expression “Beyond the Pale” is related to this topic, specifically as it applies to Ireland and Scotland.

Ancient maps of the British Isles colored all areas that were under the control of Rome, and later England, with a pale flesh tone color.

Geography that was outside those “pale” areas was considered unknown and probably quite dangerous.

[Frank_2001]

“was considered unknown and probably quite dangerous.”

Wandering around a Scotsman’s land can DEFINITELY be dangerous! ;)

[SteveH]

This seems to be the Irish origin or variant origin:

https://en.wikipedia.org/wiki/The_Pale