Somewhere between the instinct to toss a penny in a fountain and the irresistible urge to leave a mark in places we love, humanity has managed to invent a new tradition: forcibly wedging loose change into the cracks of a 60-million-year-old geological marvel. According to BBC News, the basalt columns of the Giant’s Causeway are now serving double duty as an impromptu piggy bank, with tourists and locals alike hammering coins into the very crevices that make the site so famous.

The Road to Rust is Paved with Good Intentions

The custom has echoes of Paris’s “love locks,” as BBC News points out—objects left behind for luck or love, accumulating until the very structure they adorn is put at risk. In Paris, locks were eventually banned after part of the bridge collapsed in 2014. The Giant’s Causeway hasn’t suffered a similar fate, but the effects are visible. As described in BBC coverage, coins are now jammed in “every fissure and crevice”—especially in an area called The Loom, where ten-foot-high basalt towers sport streaks of reddish-brown.

The discoloration, explained by Dr. Cliff Henry of the National Trust in comments to both BBC News and LBC, is a result of the coins rusting rapidly in the coastal atmosphere. He notes this isn’t just an aesthetic problem: “Once the coin is in there it starts to rust… The coin then expands and that’s putting pressure on the joint near the edge, so we have seen on a number of places here that the corners have popped off.” The metals—iron, nickel, copper—leach out, creating visible stains and exerting mechanical force that chips off pieces of rock.

A report from the Geological Survey of Northern Ireland, highlighted in LBC’s coverage, further backs this up: the practice is causing both aesthetic and structural damage. Notably, Dr. Henry observes that visitors may use stones picked up from the ground to hammer coins in, which only adds further insult by actively chipping the ancient columns. The result isn’t just a change in color but in structure—corners breaking away, cracks widening, and a slow-motion vandalism playing out on a UNESCO World Heritage Site.

Leaving a Mark: The Science of Souvenirs (and Peer Pressure)

Why do people do it? Dr. Henry offers a straightforward explanation to BBC News, pointing at copycat behavior: people see a coin, so they add their own. According to LBC, it’s a compulsion to leave something behind—to make a moment or a memory physical, as if a coin hammered into basalt granted a kind of immortality. It mirrors other tourist rituals: love locks, initials scratched into trees, gum walls, all with a cumulative, rarely intended consequence.

Dr. Kirstin Lemon from the Geological Survey of Northern Ireland—speaking to BBC News—advises removing as many coins as possible to halt both the physical chipping and chemical leaching. She explains that by extracting the metal, further impact can be avoided, and ideally, the practice will lose its lure if fewer coins are visible. A specialist stonemason, according to details provided by BBC News, has managed to remove about 10% so far in test areas; notably, the National Trust stresses public attempts to extract coins should be avoided to prevent more damage.

Tourist numbers provide context for the scale. Both LBC and BBC News note the Giant’s Causeway saw about 684,000 visits in the past year, a figure climbing back toward its pre-pandemic peak of nearly a million. Even if only a small fraction of those visitors leave coins, the cumulative effect is clear—an accelerating problem on what Dr. Henry calls, in LBC’s account, “a very rapid erosion,” especially when measured by geological standards.

The Unsought After Souvenir

Trying to stem the tide, caretakers now rely on signage, pleas from tour guides, and ongoing restoration work. As the outlet notes, Mark Adams, a Giant’s Causeway tour guide, suggests a modern alternative: “If you want to leave something behind, take a photo, put it online, it’ll be there forever.” It’s a suggestion that feels both a little wistful and very 21st-century.

Underlying all this is a quietly troubling question: how quickly does a “harmless” gesture tip into something else entirely? The Giant’s Causeway is not only a crown jewel of Northern Ireland’s identity, as Dr. Henry argues to both BBC News and LBC, but a globally recognized natural site, protected as a World Heritage property and central to the local economy. Its survival depends less on weather and more, apparently, on whether people can resist acting on a fleeting impulse.

Our Relationship with Rocks, Relics… and Reputation

There’s a lesson here, somewhere between geology and psychology. The Giant’s Causeway is older than our species; it has survived ice, sea, and the long march of time. But in a few short years, the traditions we invent—especially when fueled by the power of suggestion and echo-chamber peer pressure—can do swift and unexpected harm.

Whether it’s a padlock, a coin, or some other token, the compulsion to leave mementos cuts both ways: it carves out a connection for us, even as it carves chunks out of places we claim to cherish. The site’s caretakers and geologists are left picking up (or chiseling out) the pieces, one coin at a time.

So as visitors gesture for luck or legacy, one wonders: will a photograph really be enough? Or is the urge to etch ourselves onto the landscape just too strong to resist—and if so, what will left-behind souvenirs look like in another sixty million years? The evidence, as the Causeway now wears visibly, is right between the cracks.