Errigal Mountain, County Donegal, Ireland. Proving once again that the country has more than its fair share of spectacular scenery, Errigal rises out of the bogland of north west Ireland to meet the sky.

Errigal is made of quartzite, a durable metamorphic rock created millions of years ago, when shifting tectonic plates caused sedimentary sandstone to be subjected to great heat and pressure deep in the earth.