Snowdonia is Britain's second-biggest national park, after the Lake District, and boasts rugged mountain trails through some of the tallest peaks south of the Scottish Highlands. The tallest peak is Mount Snowdon at 3,560ft (1,068m), which is visited by half a million people each year, many climbing or walking while the less adventurous ride the Snowdon Mountain Railway to the top. While Snowdonia is a haven for hikers and climbers, there is plenty else to explore including lakes, waterfalls and glacial valleys, as well as forts, railways and the crumbling remains of the country's mining heritage. Other nearby destinations not to be missed include the beautiful Victorian resort of Betws-y-Coed, whose former copper mines are open to the public, and Blaenau Ffestiniog, which also offers tours through its cavernous slate mines.

Website: www.eryri-npa.co.uk

Admission: Free