Passage Du Gois – Vendée, France
The Passage du Gois is a phenomenal stretch of road submerged in seawater twice daily and passable by vehicles at other times. It connects Beauvoir-Sur-Mer and the island of Noirmoutier in the southwest of France on the Atlantic coast and is often covered by water during high tides.
The French government probably keeps its height at this level to preserve nature and the passage’s unique beauty. Although, if a vehicle gets caught in the tide, it might be difficult to reach either way in chest-deep water as the route stretches over 2.6 miles. The spectacular highway has also twice been used for the Tour de France.