Tidal island in the context of Fortification

Peñón de Vélez de la Gomera (Spanish pronunciation: [peˈɲon de ˈβeleθ ðe la ɣoˈmeɾa]), also known as Hajar Badis (Arabic: حجر بديس, romanized: Hajar Badis), is a Spanish exclave and rocky tidal island in the western Mediterranean Sea. It is connected to the Moroccan shore by a sandy isthmus, and to a smaller islet to the east, La Isleta, by a rocky isthmus. The tidal island was historically named Hajar Badis (Rock of Badis), referring to its proximity to the town of Badis.

Vélez de la Gomera, along with La Isleta, is a historic overseas possession known as a plaza de soberanía. It is administered by the Spanish central government and has a population consisting only of a small number of Spanish military personnel.

St Michael's Mount (Cornish: Karrek Loos yn Koos, meaning "hoar rock in woodland") is a tidal island in Mount's Bay near Penzance, Cornwall, England, United Kingdom. The island is a civil parish and is linked to the town of Marazion by a causeway of granite setts, passable (as is the beach) between mid-tide and low water. It is managed by the National Trust, and the castle and chapel have been the home of the St Aubyn family since around 1650.

Historically, St Michael's Mount was an English counterpart of Mont-Saint-Michel in Normandy, France, which is also a tidal island, and has a similar conical shape, though Mont-Saint-Michel is much taller.

Mont-Saint-Michel (French pronunciation: [lə mɔ̃ sɛ̃ miʃɛl]; Norman: Mont Saint Miché; English: Saint Michael's Mount) is a tidal island and mainland commune in Normandy, France.

The island lies approximately one kilometre (one-half nautical mile) off France's north-western coast, at the mouth of the Couesnon River near Avranches and is 7 hectares (17 acres) in area. The mainland part of the commune is 393 hectares (971 acres) in area so that the total surface of the commune is 400 hectares (990 acres). As of 2019, the island has a population of 29.

Lindisfarne, also known as Holy Island, is a tidal island off the northeast coast of England, which constitutes the civil parish of Holy Island in Northumberland. Holy Island has a recorded history from the 6th century AD; it was an important centre of Celtic Christianity under Saints Aidan, Cuthbert, Eadfrith, and Eadberht of Lindisfarne. The island was originally home to a monastery, which was destroyed during the Viking invasions but re-established as a priory following the Norman Conquest of England. Other notable sites built on the island are St Mary the Virgin parish church (originally built in 635 CE and restored in 1860), Lindisfarne Castle, several lighthouses and other navigational markers, and a complex network of lime kilns. In the present day, the island is an Area of Outstanding Natural Beauty and a hotspot for historical tourism and bird watching. As of February 2020, the island had three pubs, a hotel and a post office as well as a museum.

Douglas Island (Tlingit: Deishú Áakʼw) is a tidal island in the U.S. state of Alaska. It is part of the city and borough of Juneau, just west of downtown Juneau and east of Admiralty Island. It is separated from mainland Juneau by the Gastineau Channel, and contains the communities of Douglas and West Juneau.

Cortegada is an almost tidal island (it is possible to walk there at the lowest tides, but a small amount of water always remains) in a coastal inlet near Pontevedra in Galicia, Spain. It is part of the Atlantic Islands of Galicia National Park.

Riffe Lake is a long reservoir on the Cowlitz River in the U.S. state of Washington. The 23.5 mi (38 km) lake was created by the construction of Mossyrock Dam, the tallest dam in the state, in 1968 by Tacoma City Light (now Tacoma Power). Riffe Lake includes 6 islands, 3 of which being incredibly small, sandy islets, and one being a tidal island. None of them have names.

Neuwerk (German pronunciation: [ˌnɔʏˈvɛʁk] ; Low German: Neewark; Archaic English: New Werk or Newark) is a 3 km (1.2 sq mi) tidal island in the Wadden Sea ("Mudflat Sea") a marginal part of North Sea along the German coast. The population in 2023 was 21. Neuwerk is located 13 km (8 mi) northwest of Cuxhaven, between the Weser and Elbe estuaries. The distance to the centre of Hamburg is about 120 km (70 mi).

Administratively, Neuwerk forms a homonymous quarter of the city and state of Hamburg, Germany, and is part of the borough Hamburg-Mitte. This quarter includes the islands of Scharhörn and Nigehörn, which are bird sanctuaries and closed to the public. All three islands and the Wadden Sea around them form the Hamburg Wadden Sea National Park.

Lihou (/liːˈuː/) is a small tidal island just off the west coast of the island of Guernsey, in the English Channel, between Great Britain and France. Administratively, Lihou forms part of the Parish of St Peter's in the Bailiwick of Guernsey, and is now owned by the States of Guernsey, although there have been a number of owners in the past. Since 2006 the island has been jointly managed by the Guernsey Environment Department and the Lihou Charitable Trust. In the past the island was used by locals for the collection of seaweed for use as a fertiliser, but today Lihou is mainly used for tourism, including school trips. Lihou is also an important centre for conservation, forming part of a Ramsar wetland site for the preservation of rare birds and plants as well as historic ruins of a priory and a farmhouse.

Spurn is a narrow sand tidal island located off the tip of the coast of the East Riding of Yorkshire, England that reaches into the North Sea and forms the north bank of the mouth of the Humber Estuary. It was a spit with a semi-permanent connection to the mainland, but a storm in 2013 made the road down to the end of Spurn impassable to vehicles at high tide.

The island is over three miles (five kilometres) long, almost half the width of the estuary at that point, and as little as 50 yards (45 metres) wide in places. The southernmost tip is known as Spurn Head or Spurn Point and was, until early 2023, the home to an RNLI lifeboat station and two disused lighthouses. It forms part of the civil parish of Easington.

The Hilbre Islands (/ˈhɪlbriː/ HIL-bree) are three tidal islands in Merseyside, England. They lie off the coast of the Wirral Peninsula at the mouth of the Dee Estuary, opposite Talacre in Flintshire, Wales. The name is thought to derive from a chapel built on the Island and dedicated to St. Hildeburgh.

The islands are a Local Nature Reserve and are within the Dee Estuary Site of Special Scientific Interest. As of 2012, the islands have no permanent residents. They can be reached by foot from West Kirby during low tide.