Princess Kate climbs highest mountains in England, Scotland and Wales

LONDON (CBS, KYMA) - Princess Kate is raising awareness and money for cancer in a unique way as she finished one of the U.K.'s hardest mountaineering challenges.

She climbed the highest mountains in England, Scotland and Wales all within 24 hours.

On Instagram, the Princess of Wales posted a video message, sharing the reason behind her decision to take on this feat.

"Lots of people have asked me why I'm doing this challenge. Partly, it's personal. I'm so grateful to be here to be strong enough to walk these hills. but more importantly it's to give something back," Princess Kate expressed. "I really wanted to use this opportunity as my way of contributing to all the wonderful work that's going on, and in particular to support the Royal Marsden charity, an organization very dear to me."

Princess Kate revealed two years ago that she had cancer and was treated at the Royal Marsden Hospital in London.