# Tidal island

A tidal island is a raised area of land within a waterbody, which is connected to the larger mainland by a natural isthmus or man-made causeway that is exposed at low tide and submerged at high tide, causing the land to switch between being a promontory/peninsula and an island depending on tidal conditions.
Because of the mystique surrounding tidal islands, many of them have been sites of religious worship, such as Mont-Saint-Michel with its Benedictine abbey. Tidal islands are also commonly the sites of fortresses because of the natural barrier created by the tidal channel.

## List of tidal islands
### Asia
#### Hong Kong

* Ma Shi Chau in Tai Po District, northeastern New Territories, within the Tolo Harbour
* Kiu Tau Island in Sai Kung

#### Iran

* Naaz islands in the Persian Gulf, southern seashore of Qeshm island

#### Japan

* Enoshima, in Sagami Bay, Kanagawa Prefecture

#### Taiwan

* Kueibishan in Penghu
* Jiangong Islet in Kinmen

#### South Korea

* Jindo Island and Modo Island in southwest South Korea
* Jebudo in the west

### Europe
#### Denmark

* Mandø Island – on Denmark's western coast
* Knudshoved Island – north of Vordingborg on southern Zealand, Denmark

#### Denmark/Germany

* The Halligen in the North Frisian Islands, Denmark/Germany

#### France

* Île Aganton in Brittany
* Île Madame in Charente-Maritime
* Île de Noirmoutier in Vendée
* Mont Saint-Michel in Normandy
* Tombelaine in Normandy
* Grand Bé, Petit Bé and Fort National in Saint-Malo

#### Germany

* The Neuwerk in the Wadden Sea

#### Guernsey

* Lihou in Guernsey, one of the Channel Islands

#### Iceland

Grótta in Seltjarnarnes, the Capital Region

#### Ireland

* Coney Island near Rosses Point, County Sligo
* Omey Island in Connemara, County Galway
* Inishkeel, County Donegal

#### Italy

* Isola Grande, Sicily

#### Jersey

* Elizabeth Castle in Jersey, a castle off the south coast accessible on foot at low tide
* Saint Aubin's Fort
* La Corbière Lighthouse
* La Motte, Jersey, alias Green Island
* L'Avarison, which hosts Seymour Tower
* Archirondel Tower, now connected via permanent causeway
* Icho Tower
* Portelet Tower

#### Spain

* Cortegada Island in Pontevedra coast, Galicia.
* San Nikolas Island in Lekeitio, Bizkaia

#### United Kingdom
##### England

* Asparagus Island, Mount's Bay, Cornwall
* Burgh Island, Devon
* Burrow Island, Portsmouth Harbour
* Chapel Island, Cumbria
* Chiswick Eyot in the River Thames in London
* Gugh in the Isles of Scilly (joined to St Agnes at low tide)
* Hilbre Island, Middle Eye and Little Eye in the River Dee estuary, between North Wales and the English Wirral, but administratively in England.
* Horsey Island, Essex
* Lindisfarne, Northumberland, also known as Holy Island
* Mersea Island, Essex (accessible to road traffic via the Strood)
* Northey Island, Essex
* Osea Island, Essex
* Piel Island, Cumbria
* Scolt Head Island, Norfolk
* Sheep Island, Cumbria (joined at low tide to Piel Island and to Walney Island)
* St Mary's Island, North Tyneside
* St Michael's Mount, Cornwall
* White Island, Isles of Scilly and St Martin's, Isles of Scilly

##### Northern Ireland

* Nendrum Monastery on Mahee Island, Strangford Lough
* Guns Island, near Ballyhornan
* Isle of Muck, Portmuck

##### Scotland

* Baleshare in the Outer Hebrides, joined to North Uist
* Bernera Island, joined to Lismore
* Brough of Birsay in Orkney, joined to Orkney Mainland
* Castle Stalker on Loch Laich in Argyll
* Cramond Island in the Firth of Forth
* Island Davaar near Campbeltown, off the Kintyre peninsula
* Eilean Arnoil in the Outer Hebrides, joined to the Isle of Lewis
* Eilean Donan in the western Highlands of Scotland
* Eilean Fladday and Eilean Tigh off the Isle of Raasay
* Eilean Shona in Loch Moidart, Lochaber, Highland
* Eilean Tioram, in Loch Moidart
* Erraid off the Isle of Mull
* Hestan Island near Rough Island in Auchencairn Bay
* Islands of Fleet: Ardwall Isle and Barlocco Isle in Galloway
* Isle Ristol, the innermost of the Summer Isles
* Kili Holm in Orkney, joined to Egilsay
* Oronsay in the Inner Hebrides, joined to Colonsay
* Oronsay in Loch Bracadale, joined to Skye
* Orosay in the Outer Hebrides, joined to Barra
* Rough Island opposite Rockcliffe, Dumfries & Galloway
* Vallay (Bhàlaigh), joined to North Uist in the Outer Hebrides

##### Wales

* Burry Holms off the Gower
* Cribinau off Anglesey
* Gateholm off the south west coast of Pembrokeshire
* Ynys Llanddwyn off Anglesey
* Mumbles Lighthouse located in Mumbles, near Swansea
* St Catherine's Island in Pembrokeshire
* Sully Island in the Vale of Glamorgan
* Worm's Head at the end of the Gower
* Ynys Cantwr off Ramsey Island, Pembrokeshire
* Ynys Feurig off Anglesey
* Ynys Gifftan in Gwynedd
* Ynys Gwelltog off Ramsey Island, Pembrokeshire
* Ynys Lochtyn on the coast of Cardigan Bay
43 (unbridged) tidal islands can be walked to from the UK mainland.

### North America
#### Canada

* Bird Islet in Neck Point Park, Nanaimo, British Columbia, Canada
* Finisterre Island off of Bowen Island, British Columbia, Canada
* Francis Peninsula off of Sunshine Coast (British Columbia), British Columbia, Canada
* Micou's Island in St. Margarets Bay, Nova Scotia, Canada
* Minister's Island in New Brunswick, Canada
* Ross Island and Cheney Island in Grand Manan, New Brunswick, Canada
* Wedge Island, Nova Scotia, Canada
* Whyte Islet in West Vancouver, British Columbia, Canada

#### United States

* Bar Island in Maine
* Battery Point Light in California
* Bumpkin Island in Massachusetts
* Camano Island in Puget Sound of Washington state, since earth filled
* Charles Island, in Connecticut
* Douglas Island in Alaska
* High Island, New York
* Long Point Island, Harpswell, Maine
* Tskawahyah Island of Cape Alava, Washington

### Oceania
#### Australia

* The Point Walter Sandbar in Perth, Western Australia has slowly formed into a tidal island and is only connected to the mainland in extreme low tides.
* Penguin Island (Western Australia) in the Shoalwater Islands Marine Park
* Former tidal island Bennelong Island in Sydney, Australia was developed into Bennelong Point and is now the location of the Sydney Opera House.

#### New Zealand

* Matakana Island in Tauranga Harbour
* Opahekeheke Island in the Kaipara Harbour
* Puddingstone Island in Otago Harbour
* Rabbit Island, Bells Island, and Bests Island in Tasman Bay
* The Hauraki Gulf islands of Motutapu Island and Rangitoto Island are connected at low tide
* The Okatakata Islands in Rangaunu Harbour