Wookey Hole Caves planning permission. Wookey Hole Caves Wookey Hole Caves () are a series of limestone caverns, a show cave and tourist attraction in the village of Wookey Hole on the southern edge of the Mendip Hills near Wells in Somerset, England. The River Axe flows through the cave. It is a Site of Special Scientific Interest (SSSI) for both biological and geological reasons. Wookey Hole cave is a "solutional cave", one that is formed by a process of weathering in which the natural acid in groundwater dissolves the rocks. Some water originates as rain that flows into streams on impervious rocks
North Somerset Levels have been designated as Sites of Special Scientific Interest. Tickenham, Nailsea and Kenn Moors SSSI is an extensive SSSI in the northern part of the Levels. Yanal Bog, a calcicolous mire near Sandford is designated for its plant communities, within which grow Black Bog-rush ("Schoenus nigricans") and Blunt-flowered Rush ("Juncus subnodulosus"), two plant species rare in southwest England. A number of plant species which are otherwise scarce or absent in the Bristol region are found in high concentrations on the North Somerset Levels, including Water Horsetail ("Equisetum fluviatile"), Rigid ("Ceratophyllum demersum") and Soft ("C. submersum") hornworts, Thread-leaved ("Ranunculus trichophyllus"), Common