Giant’s Causeway visitors causing damage by wedging coins into cracks

Visitors to Northern Ireland’s Giant’s Causeway are damaging the historic site by wedging coins into its basalt columns, which rust and expand to three times their thickness, causing the rock to crumble and stain. Authorities have urged people to stop this tradition to protect this natural wonder for future generations, while last year’s 648,000 visitors highlighted its popularity but also emphasized the need to preserve its beauty and history.