Tourist Coins Pose Giant Problem At N. Ireland's Famous Causeway Site

Visitors have been leaving coins in cracks at the Giant's Causeway in Northern Ireland (Credit: AFP)

Northern Ireland's Giant Causeway draws close to one million visitors a year but their habit of wedging tiny coins in cracks between the rocks -- to bring love or luck -- is damaging the world-famous wonder.

Now authorities are urging tourists to keep their coins in their pockets to preserve the spectacular landscape.