Beyond it, I can see at least 70 miles across ... Mountains were underwater, part of a flourishing reef that once stretched about 400 miles around the edge of a long-vanished sea.

These mountains used to be under the sea, and after rising up ... and packed with monumental glaciers that scraped their way ...

Most important, the sound is intended to shatter the mountain silence and cast its spell on nature ... Nowadays, surprised wanderers might still come across fortified, impregnable wooden strongholds ...

Pen Y Fan is 886 metres above sea level. Slieve Donard is the tallest mountain in Northern Ireland ... When they started to melt, they slid slowly across the land and their enormous weight carved ...