Snowdonia (Wales). 'The rugged northwest corner of Wales has rocky mountain peaks, glacier-hewn valleys, sinuous ridges, sparkling lakes and rivers, and charm-infused villages. The busiest part is around Snowdon itself, where many people hike to the summit, and many more take the jolly cog railway, while to the south and west are rarely trod areas perfect for off -the-beaten-track exploration.' http://www.lonelyplanet.com/wales
Langdale in Lake District - England Surrounded on all sides by towering peaks, saw-tooth ridges and scree-strewn slopes, the Langdale Valley is one of the most dramatic sights in the Lake District. Beautiful for multi-day hikes.