Giant's Causeway
Ulster
The Giant's Causeway is a remarkable natural formation located on the north coast of Northern Ireland in County Antrim. It consists of approximately 40,000 interlocking basalt columns created by volcanic fissure eruptions around 50 to 60 million years ago during the Paleogene period. The columns, mostly hexagonal but sometimes with four to eight sides, rise up to 12 meters tall and form natural stepping stones that extend from the cliffs into the sea. This geological marvel is part of the North Atlantic Igneous Province and was once a volcanic plateau known as the Thulean Plateau. The site was declared a UNESCO World Heritage Site in 1986 and is managed largely by the National Trust, attracting nearly a million visitors annually. Beyond its geological significance, the Giant's Causeway is steeped in Irish mythology, famously linked to the legend of the giant Fionn mac Cumhaill who is said to have built the causeway to challenge a Scottish giant. The site’s unique rock formations and coastal scenery make it one of Northern Ireland's most iconic natural attractions, offering visitors a blend of scientific intrigue and cultural heritage.
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Tip: Visit during the spring and early autumn months for the best weather and fewer crowds. Entrance to the Giant's Causeway itself is free, though parking and visitor center access may require a fee. Booking tickets for the visitor center in advance is recommended to avoid queues. Wear sturdy footwear as the terrain can be uneven and slippery near the columns. Guided tours are available for a more informative experience. Check the National Trust website for up-to-date opening hours and accessibility information.
Interesting facts
- •The Giant's Causeway comprises about 40,000 interlocking basalt columns, mostly hexagonal in shape.
- •The tallest columns reach approximately 12 meters (39 feet) in height.
- •The basalt formed part of the ancient Thulean Plateau, a volcanic region during the Paleocene Epoch.
- •The site was named a UNESCO World Heritage Site in 1986 for its geological significance.
- •The columns extend into the sea, creating natural stepping stones that disappear underwater.
- •The Giant's Causeway inspired local legends involving the Irish giant Fionn mac Cumhaill and his rivalry with the Scottish giant Benandonner.
- •The site is managed primarily by the National Trust and receives nearly a million visitors annually.
History
The Giant's Causeway formed approximately 50 to 60 million years ago due to intense volcanic activity during the Paleocene Epoch, when molten basalt intruded through chalk beds creating a vast volcanic plateau.
As the lava cooled and contracted, it fractured into the distinctive polygonal columns seen today.
The site was recognized for its outstanding geological importance when it was designated a UNESCO World Heritage Site in 1986 and a national nature reserve in 1987.
It has since become a symbol of Northern Ireland’s natural heritage and a key location for geological research and tourism.
Place Guide
Basalt Columns50-60 million years ago
These polygonal columns are the primary feature of the Giant's Causeway, formed by the cooling and contraction of volcanic lava millions of years ago. Most are hexagonal, creating a striking natural mosaic along the coastline.
Visitor CentreOpened 2012
Operated by the National Trust, the visitor centre offers educational exhibits about the geology, mythology, and history of the Giant's Causeway, along with guided tours and amenities for visitors.
Coastal Walks
Several scenic trails run along the Causeway Coast, offering stunning views of the basalt formations, cliffs, and the North Atlantic Ocean. These walks vary in length and difficulty, catering to casual visitors and hikers alike.
Contact
Phone: 028 2073 1855
