Pisco to Nazca
It's been an eventful week for our intrepid cyclist as he continues to clock up some major miles in Peru. At the tail end of last week Mark spent an evening in Pisco, a small town on the Pacific coastline, which was devastated by a huge earthquake in 2007. Work continues to rebuild the region and Mark discovered the impact of the quake on the local community.
The road south led to a guinea pig farm (Peruvians eat 65 million of them every year) and to the mysterious Nazca Lines. There are many contradicting theories for exact purpose of the enormous drawings in the sand - which stretch 80 kilometres across the desert - however to date they remain an enigma, no one really knows why and how the Nazca Lines were created.
We have picked out a few of the snaps from the last few days, and you can discover the full collection of pictures from Mark's journey on his flickr photostream.
More updates from Mark to come later in the week including his weekly chat with Radio 1's Greg James.