"The people lead a very slow paced life; they don't have many cares or worries, they go with the flow.
"I thought that was a very cool way to live their lives and just being surrounded by the beautiful mountains was very peaceful.
"I want to go back now; I can't focus in class," he said.
Although he did not find the walking side of the trek difficult he did struggle with the lack of oxygen. The trek reached an altitude of 4000m.
"The air is quite thin; it's very hard to breathe," he said.
Keith spent a few days in Nepal's capital, Kathmandu which he likened to India.
"It's a bit dirty, polluted, busy and loud. It was a bit of a shock," he said.
While there he went to Boudhanath Stupa, a Buddhist temple.
"It was an introduction to the Buddhist religion and I was really taken away by the religion," he said.
On his way back to New Zealand, Keith spent two weeks volunteering at the Singapore Zoo - a huge culture shock.
"Nepal is a third world country; Singapore is very clean, organised and busy, something didn't seem right about it.
"It had seven million people packed into an area the size of Lake Taupo; the majority of the buildings are high rises and it's just pandemonium, everywhere."
He said he wouldn't want to visit Singapore again, but he enjoyed his time at the zoo.
His family teased him about having to pick up the animals' poo - which turned out to be exactly what he did.
"The first day I got there I was put into the wild Africa section and my first job was to clean a pile of rhino poo and rhino poo is big and smelly.
"I did pick up poo for two weeks but it was a very rewarding experience because after I picked up the poo I got to feed them," he said.
He was able to feed animals like zebras, giraffes, rhinos and nyalas. Keith also saw a rhino give birth as he was working; he said the baby rhino was about the size of a small pig.
Next year, Keith is going to study Environmental Science at Canterbury University. He also wants to go back to Nepal and work at a Buddhist Monastery for a year, teaching English.
