She said there have been many ups and downs throughout the epic trek: "It can be quite mentally and physically tiring. My husband was very supportive, especially as I'm raising money for his charity. But during the journey our relationship deteriorated. The stress of it all and the distance took their toll and we ended up separating. It was a desperately sad time, but I persevered." Megan Lewis photographed in the Akyrtas Ruins, Kazakhstan Picture: Helen Yates / Barcroft Media

Credit : Helen Yates / Barcroft Media