The Giant’s Causeway, a famous natural wonder in Northern Ireland, is facing a unique problem. Visitors to the site have been leaving behind coins inserted into the iconic rocks, causing damage and erosion.
According to the National Trust, which cares for the site, this practice has increased significantly over the past decade. The organization is now asking visitors to keep their spare change in their pockets rather than leaving it behind as a memento.
Visitor Impact
Each year, hundreds of thousands of tourists and locals visit the Giant’s Causeway. However, only a small fraction leave behind unwanted items like coins. The worst-affected areas are:
- The Loom: 10ft-high leaning towers of rock that are slightly lighter in color than the iconic hexagonal black basalt at the point of the causeway.
Dr. Cliff Henry notes that people who see others putting coins in may copycat and take stones off to hammer them home, leading to chipping or breaking off pieces from other stones nearby.
Structural Risks
The damage caused by coins is not just aesthetic; it also poses structural risks:
- Rusting metal inside cracks causes expansion, leading to popping out corners.
- Iron oxide (rust) is leaching onto surrounding rocks, making them look unsightly.
A report by Geological Survey NI found that removing all remaining coinage could help prevent further damage. A specialist stonemason has started work removing around 10% of existing coinage so far without damaging any stones.
Call for Cooperation
"We need visitors’ cooperation," said Dr. Cliff Henry about preventing further damage at this historic site. "Removing all remaining coinage would be ideal, but we know this will be difficult," he added.
In addition to removing existing coinage, Dr. Henry recommends educating visitors about how they can help protect this natural wonder. "We need people not just to refrain from putting more money into these holes but also to tell others not to do it either," he said.
Geological Significance
The Giant’s Causeway was formed millions of years ago when volcanic activity created an area where lava cooled quickly on contact with seawater, resulting in unique rock formations known as columnar jointing.
It was designated as one of the seven wonders of Northern Ireland back in 2011 and attracts hundreds of thousands each year with its stunning scenery and rich history dating back over 60 million years.
This phenomenon occurs when magma cools rapidly beneath Earth’s surface before being ejected through volcanic vents during eruptions, resulting in large columns resembling giant pillars rising up out of the water.
Conclusion
The Giant’s Causeway faces significant challenges due to the unwanted items, such as coins, left by tourists, which cause irreparable harm both aesthetically and structurally. Education plays a key role alongside removal efforts currently underway, thanks to the dedicated team working tirelessly to ensure the preservation of this natural wonder for future generations.

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