Post your country's natural borders

post your country's natural borders.

Mine: sea and alpine watershed

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it's sea, lake, river and latitude

sea, KSA, iran and turkey

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those in the south don't look like natural borders

The Nile delta and valley. Also, it looks like a flower.

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Why not the Rio grande?

Sea, mountains, and a fucking railroad.

Nope, not going there, enough bombing