
Historically named 'Wurm' meaning 'dragon' by Viking invaders, the promontory, Worm's Head, is shaped like a giant sea-serpent and marks the most westerly tip of Gower. The island is joined to the mainland by a rocky causeway and features an large flat-topped 'Inner Head', towards a natural rock bridge called 'Devil's Bridge', a 'Low Neck' leading further out to the 'Outer Head'. The headland is one mile long and the highest point is approximately 150 feet.
The rocky, jagged causeway leading out to the 'Worm' is only exposed for two and a half hours before and after low tide, so walkers should always carefully check the tide times before they set off over the causeway. Being trapped on Worm's Head for half the day, waiting for low tide again, is both inconvenient and desolate to say the least, but so easily done by the inexperienced. Even the young Dylan Thomas made the mistake of falling asleep on the Inner Head and missing his tide:
Dylan Thomas used to regularly visit Worm's Head and in his short story, 'Who Do You Wish Was With Us?', he wrote:
The Outer Head is a breeding ground for birds such as Herring Gulls, Guillemots, Razorbills, and Kittiwakes, with the occasional appearance of Puffins.
Walkers are requested not to climb to the top of Outer Head between 1 March and 31 August, to avoid disturbing these nesting birds.
The Outer Head is also home to Worm's Head Cave and on the north side, a natural blow hole. William Camden in the 1586 published 'Britannia' describes the blow hole thus:
During the right conditions the blow hole is heard to emit noisy, impressive boomings and hissing; in fact, there is an old Gower saying - "The old Worm's blowing, time for a boat to be going".
The land on Worm's Head is very fertile and despite its hazards and rare accessibility, people in the past have attempted to utilise its resources. One Rhossili man decided to grow a crop of potatoes on the south side of the Inner Head, the potatoes grew very successful here and his early crop was earlier than anyone else's, but others were deterred from following his example when the problem of getting the crop over the razor-like rocks, back to the mainland was illustrated.
Sheep farmers, in the past, have utilised the rich grazing ground on 'The Worm'. For example the Talbot family at Penrice Castle used to graze their flock of wethers on the Inner Head of Worm's Head from September to March. It has been said that Worm's Head mutton is the tastiest in Gower. However, the sheep are so fond of the seclusion and good grass growing there that they are loathed to return to mainland pastures. One Rhossili farmer, Wilfred Beynon, reported that his whole flock of sheep escaped from their mainland field in the Summer of 1932 and attempted to cross the treacherous causeway leading to the Worm. They were caught by the rising tide and all seventy of them drowned.
Owned and protected as a National Nature Reserve by the National Trust and the Countryside Council for Wales, the varied plant life on Worm's Head is governed by the high winds, tidal spray and sun. The Outer Head is a very rare, ungrazed grassland, whereas the Inner Head, which has been grazed over the centuries, shows a large variation of plant colonies. Therefore, visitors are advised to keep to the well-worn dirt trail rather than trample on these species.
The best route for walkers to follow is down the wide path past National Trust Information Centre and shop, through the gate and follow the track for 1 mile until the former coastguard lookout hut is reached (it is now the Countryside Council for Wales Informaion Centre). From here start the decent to cross the causeway. It takes about 15 minutes to scramble across the wet, jagged rocks of the causeway. When the Inner Head is reached follow the dirt track round the south side (bear left), then across Devil's Bridge, around the south side (bear left again) of Low Neck, and on to the Outer Head. Remember not to climb to the top of the Outer Head between 1 March and 31 August so the nesting birds there are not disturbed and if the journey outwards is proving too long and laborious do not venture too far out and take the same route back.


