Tombolo

Tombolo at Elafonissos, Greece

<https://www.thoughtco.com/gallery-of-tombolos-4122855>

A tombolo is a sandy isthmus. A tombolo, from the Italian tombolo, meaning 'pillow' or 'cushion'. It is a deposition landform by which an island becomes attached to the mainland by a narrow piece of land such as a spit or bar. Once attached, the island is then known as a tied island.

Several islands tied together by bars which rise above the water level are called a tombolo cluster. Two or more tombolos may form an enclosure (called a lagoon) that can eventually fill with sediment.

There are many places in the world that you can see a beautiful tombolo.

France and the UK have tombolos with castles built on them and you can only walk out to it during low tide.

Tombolo at Mont St. Michel, Normandy, France