How Good Is Your Geographic? [5]

[D-Type]

Here's a quick one.

Borders between countries either follow geographical features like rivers and mountain ranges, or they are straight lines drawn on a map.

This particular border is essentially straight lines on a map but it has a marked 'kink' around a particular geographical feature. An apocryphal story says that this is because one monarch gave this feature to another as a Christmas or birthday gift.

(1) Who were the two monarchs?
(2) What is the geographical feature?
(3) What are the two countries the border separates?


To avoid any confusion, I will consider this is solved by the person who provides the last piece of the answer not the person who provides most pieces.

[gadjo_dilo]

That's strange....
During history monarchs fought to take territories from one to another. It's for the first time when I hear of such a gift. Probably a king who was in love with a queen from the neighbourhood.....

[D-Type]

No, the two monarchs were related and their countries were at peace with each other. I don't think they had ever been to war with each other. Before that time!
The border was not between the two countries that the monarchs ruled.
There is some doubt whether this actually happened or whether the border was simply agreed in a treaty.

[edv]

Could this be about the old Hashemite royal families of Iraq/Jordan? (although I can't imagine what the geographic feature might be at the 'kink')

[D-Type]

No - wrong continent, both for the geographic feature and border, and the countries the two monarchs lived in..

[edv]

Hmmm. Is it the border between England and Scotland?

[D-Type]

Nope.

The border in question is on one continent while the countries the monarchs ruled are on another. And neither is Asia.

[edv]

Old world monarchs with new world colonies?
Could it be the goofy little notch in the border at the southern tip of Colombia giving access to the Amazon? Spanish/Portuguese monarchs?

[gadjo_dilo]

Straight line borders are only in Africa and between USA and Canada. I tend to think it's the latter and the monarchs were british and french. Continuing to speculate the geographical feature is Niagara Falls. Ha, ha. I think I've drunk a bit more.

[D-Type]

Not either of the Americas. Not a waterfall.