Six of the recycled stone pillars marking the main paths up the mountain - Llanberis Path, Rhyd-Ddu Path, Snowdon Ranger Path, Miners Track and the Pyg Track - are being erected over the next few weeks.

BBC: Snowdon: Pillars to guide walkers on paths

This year, the UNESCO Institute for Lifelong Learning (UIL) is marking the occasion with a variety of activities whose main purpose is to promote tolerance, equity and social justice through access to quality basic education and lifelong learning.

UNESCO: CONFINTEA VI

The national museum is marking the beginning of the free entry era by the symbolic release of balloons at its main site in Cathays Park, Cardiff.

BBC: Museums launch free entry