How would fancy climbing some of the capital's most iconic buildings?
Well that's exactly what's on offer to any who takes up Mencap's 'Step-Up Challenge'.
The learning disability charity is offering the chance to climb the Walkie Talkie in the City, Portland House in Victoria and 5 Strand in Charing Cross.
In total it would be 71 stories, and the charity are throwing in a 6 K run for measure.
It's not for the faint hearted, but it is for a good cause.
Paddy Griffiths from Mencap and Ciara Lawrence who has learning difficulties an works with Mencap joined Headline London to talk about this new challenge.