In the rock of Dore Holm is a natural archway, 70 ft.
The ilex, also known as the "holm oak" from its resemblance to the holly, abounds in all the Mediterranean countries, showing a partiality for the sea air.
Some of these experiments were made on Salisbury Plain and others in the Bristol Channel between Lavernock and Flat Holm and Bream Down in 1897.
A later king named Eohric took up the cause of zEthelwald, the son of 'Ethelred I., and was slain in the fight with the Kentish army at the Holm in 905.
Off the south-east shore lies the Holm (160 ft.), with which communication used to be maintained by means of the Cradle of Noss swing or ropes.