They saw for real the tectonic plates, as well as basalt rock columns and spectacular waterfalls.
A party of 44 GCSE students and five members of staff made the five-day trip.
Oliver Gardner, 14, said: “It was very good and interesting, When you got outside of Reykjavik there was just nothing for miles and it was like you were driving into the middle of nowhere.”
Students described how on one side the landscape was flat reclaimed land while on the other the huge snow-capped mountains could be seen.
“I think it will help me to understand what I am learning even better.”
The party went to the beach, but found it a complete contrast to their summer holiday destinations as the sand was black and in the ocean were icebergs.
Ellie-Rose Ormerod, 14, said: “We got to walk behind a waterfall and it was very cold and we all got very wet.”
They all agreed that their favourite part was getting to swim in the Blue Lagoon, a massive natural geothermal open air pool where they also enjoyed mud face treatments. They would all like to return to the country in the future.