Ynys Castell
Encyclopedia
Island
An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...
in the Menai Strait
Menai Strait
The Menai Strait is a narrow stretch of shallow tidal water about long, which separates the island of Anglesey from the mainland of Wales.The strait is bridged in two places - the main A5 road is carried over the strait by Thomas Telford's elegant iron suspension bridge, the first of its kind,...
which separates Anglesey
Anglesey
Anglesey , also known by its Welsh name Ynys Môn , is an island and, as Isle of Anglesey, a county off the north west coast of Wales...
and mainland Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...
. It is an extruding piece of Precambrian
Precambrian
The Precambrian is the name which describes the large span of time in Earth's history before the current Phanerozoic Eon, and is a Supereon divided into several eons of the geologic time scale...
schist
Schist
The schists constitute a group of medium-grade metamorphic rocks, chiefly notable for the preponderance of lamellar minerals such as micas, chlorite, talc, hornblende, graphite, and others. Quartz often occurs in drawn-out grains to such an extent that a particular form called quartz schist is...
lying to one side of the Afon Cadnant
Afon Cadnant
The Afon Cadnant is a small river on Anglesey, North Wales draining to the Menai Strait about 1 km north-east of the Menai Suspension Bridge...
estuary. It lies between Ynys y Bîg
Ynys y Bîg
Ynys y Bîg is a small private island in the Menai Strait attached to the island of Anglesey by a short causeway. The causeway runs from the grounds of a private house, itself also called Ynys y Bîg, preventing any public access....
and Ynys Gaint
Ynys Gaint
Ynys Gaint is a small island in the Menai Strait connected to the town of Menai Bridge on Anglesey by a causeway and also a concrete bridge erected by Sir Guy Fison in the 1930s....
. There is a causeway running to the island that is covered at high tide. On the island there is a private house.
Ynys Castell means Castle Island in Welsh.