Mont-Saint-Michel, Normandy, France

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An island of time and tide. Mont-Saint-Michel, Normandy, France

A tidal marvel and a slice of medieval life all rolled into one rocky outcrop—welcome to Mont-Saint-Michel in Normandy, northern France. The story of this 'Wonder of the West' goes back to the early 8th century, when Archangel Michael was said to have appeared to the bishop of Avranches in a vision. The divine message was clear: build a sanctuary on this rock. Taking this angelic advice seriously, the bishop laid the foundations of what would eventually become the abbey that dominates the island today. Over the centuries, this UNESCO World Heritage Site grew in size and reputation, attracting monks, pilgrims and invaders alike.

One of the things that makes Mont-Saint-Michel such a striking place is its dramatic tidal range. When the tide is low, you can stroll across the sandy flats and approach the island on foot. But when the tide rushes in, the sea encircles the mount, turning it back into an island that can only be reached over a bridge. It's easy to see why it attracts over 3 million visitors a year.