(uplifting music)
This is the top of Pen-y-Fan, a mountain at the heart of the Brecon Beacons National Park.
Only 11,000 years ago, the valleys around this mountain were filled with ice from glaciers that dominated this landscape.
Pen-y-Fan is a landform known as a pyramid peak, where the heads of three or more glacial valleys come together.
This is a pyramid peak called Cribyn, and beneath Cribyn is a corrie and U-shaped valley, another corrie and a U-shaped valley and another corrie and a U-shaped valley.
And glaciers within these three valleys will have carved away at the mountain, creating this beautiful pointed summit.
In mountain ranges where glaciers are still at work, these pointed summits are much sharper and more spectacular.
For example, the Matterhorn in Switzerland or even Mount Everest in the Himalayas.