to have a petrol station but petrol is now sold at Helston supermarket garages. 100,000 people a year visited BT's nearby FutureWorld@Goonhilly (now closed) and many of them also called into the Craft Shop and Tea Room before making their way back from Goonhilly. Goonhilly Downs also serves as a landing point for the SEA-ME-WE 3, the longest submarine cable on Earth. Nearer to Mullion are other triple SIs including the North Predannack Downs Nature Reserve, owned and managed by the Cornwall Wildlife Trust. This reserve is prime Cornish heath (Erica vagans) with ponds and willow fen. Early Bronze Age barrows are present, and there are several ancient 'turf-hut' circles. There are remains of buildings which were part of RAF Dry Tree and later RAF Trelanvean, used during the Second World War. Both the adder – a venomous snake, and the European stonechat – a passerine bird are commonly sighted here. See also Geology of Lizard, Cornwall List of topics related to Cornwall Wind power in the United Kingdom References External links North Predannack Downs on the Cornwall Wildlife Trusts website Sites of Special Scientific Interest in Cornwall Sites of Special Scientific Interest notified in 1951 Archaeological sites in Cornwall Bronze Age sites in Cornwall Nature reserves of the Cornwall Wildlife Trust Power stations in South West England Wind farms in England Lizard Peninsula