Eleven climbers appeared to have died on the world's second highest mountain K2.

It was one of the deadliest days in mountaineering history.

Rock falls, avalanches.

Huge pieces of ice. All are big enough to kill you.

He just flew out into Devoid and he was gone.

How did it all go so wrong?

And is it really worth risking death to feel alive? Why would

somebody pay to go to a place called the death cell on a vacation? Extreme. Peak Danger. With me,

Natalia Melman Petrazella. Listen to the full series now. First on BBC Sounds. BBC Sounds, music, radio, podcasts.

Okay, so we've parked up just 100 yards away, and now this is part of the Ikneald Way Trail.

One of the oldest paths, isn't that, in the UK?

Yeah.

The oldest?

Probably, it's very hard to date tracks, because unless someone helpfully dropped a piece of pottery at the point it was being made, if it's continued in use, you know, there's probably a big track under what is now the M6 motorway, but we just have no idea.

Whereas the Echnield Way is probably very likely, very old, maybe Neolithic, so late Stone Age, certainly in existence

by the Bronze Age, so about 2000 BC. So we are very much walking in the footsteps of the ancestors.

I love walking with an expert. She knows stuff. This is Mary Anna Hotta and she is a broadcaster,

an anthropologist, an archaeologist, a geographer, a keen walker.

Yes, very much so.

And we are going to do a bit of detective work, because in the books that Marianne has written,

she gives us clues to sort of find in the landscape.

And what you see ahead, you just said a second to go, oh, I see something already.

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