During one trip on a perilous rocky desert roads in Kazakhstan he had push his unicycle 50 miles on foot along the unforgiving Mukur Road.
In November 2015, just eight months into his three-year journey, Ed was almost crushed by a skidding car that left spinning on the ice roads in Aktobe, Kazakhstan; Ed then spent six months away from the saddle, seeking sanctuary in nearby Kyrgyzstan.
He has carried a sleeping bag, tent, cooking stove, clothes and supplies in two panniers attached to his unicycle.
He crossed four continents
Ed's trip has raised a whopping £320,000 for the charity School in a Bag, which provides school equipment to vulnerable and disaster-affected children. It was founded in memory of Piers Simon, of Chilthorne Domer in Somerset, who died in Thailand during the 2004 tsunami.
At 11.30am on Friday 27th July 2018, Ed is due to unicycle through a finish line at the charity's headquarters in Somerset, where he will be cheered on by family, friends and fans. You can follow his progress on Radio Somerset from 9am on the day.
His parents, Nick and Roxanne Pratt, said: "He left school in search of a challenge and adventure.
"Anyone who has followed his journey around the world will know that he has created just that."
Luke Simon, founder and CEO of School in a Bag, said: "Back in 2014, we received an email from a chap called Ed saying he was unicycling around the world, that he wanted to do it for charity, and why should he choose us?
Mr Simon said the charity was thrilled to have been part of Mr Pratt's "epic journey", adding that funds raised from his trip would directly help more than 15,000 children.