Small coins are causing giant problems at one of Northern Ireland’s most famous natural sites. Authorities are urging ...

From Parisian bridges to Rome's Trevi Fountain, tourists love leaving behind mementos—but in Northern Ireland, they're ...

There, thousands of hexagonal stone columns of various heights rise out of the North Atlantic Ocean and climb up to the foot of a cliff, as if they had been placed by a massive mythical creature ...

The National Trust has told tourists to stop jamming coins into the Giant’s Causeway over damage to the columns.

The hexagon. The six-side geometric shape has recently been appearing in jewels through either patterns fashioned in precious metal or stones cut into hexagons. Natalie Wansbrough-Jones ...

Take a look at our list of some of the fossils and stones that can be found along the shores of the Great Lakes below: Known for their unique, hexagonal pattern, the Petoskey stone is Michigan's ...