Dr Tom Challands: Today, we're in the Snowdonia National Park Wales. We'll be climbing the Cwm Idwal Slabs. These magnificent rocks were folded by tectonic activity around 400 million years ago.

The black cauldron of Cwm Idwal hangs high above the Ogwen Valley. A wild place of Yr Wyddfa (Snowdon) lilies and, some say, steam rising from the Devil’s kitchen. At its base sits a lake where, ...

The sight of Llyn Idwal is breathtaking, nestling in the north facing Cwm Idwal and surrounded by the high peaks of Y Garn and Y Glyder Fawr. The area has some amazing Welsh names including ...

Our guide is standing on a hill in Cwm Idwal, a natural amphitheatre carved out by Ice Age glaciers in the north of the national park. The surrounding rock faces tower around a clear mountain lake ...

The Cwm Idwal Winter Monitoring system is now back live and with new equipment and software. Ready for you to head up the hills in the best wintery conditions. In 2013 Natural Resources Wales (NRW) ...