French pass is an amphidromic node... it is called Te Aumiti... a giant hole into the abyss which sucks water into the Earth and keeps the level to avoid flooding.
In Italy as someone mentioned above there is another one, called Charybdis, in the strait of Messina. Another big hole that sucks an enormous amount of water from the Mediterranean.
In USA, the Old Sow, in Canada The Skookumchuck narrows and Devils Hole.... in The UK you can find a huge one called Corryvreckan. In Norway the Moskenstraumen and Saltstra
