"So it takes a few days to acclimatise back into what we call regular life."
Mr Brown, 63, said he saw polar bears, humpback whales and Arctic fox on his adventure, which included visits to the geographic North Pole and geomagnetic North Pole.
He explained: "You go to the top of Europe and keep going. We went first to the North Pole, traditional geographic North Pole, 90 degrees north. Then we went off to the geomagnetic North Pole. That's where all your compasses point north to."
In 2019 Mr Brown first attempted to get to the Northern Pole of Inaccessibility by going to Svalbard in Norway where he hoped to fly onto the ice sheet before walking across the Arctic.
However the Russian invasion of Ukraine meant he was unable to fly the Ukrainian-owned plane on to Russian-owned ice sheets.
"Ordinarily I've arranged everything and done all of the logistics, hired the boat, got the cars, brought the helicopters, walked through the jungle, hacked my way through the jungle," he said.
"On this occasion, there was an icebreaker going up to the North Pole anyway, and I managed to persuade the captain, a very nice captain, to redirect towards the Northern Pole of Inaccessibility."
The Poles of Inaccessibility are the points on Earth farthest away from either water or land.
They are: North America (Allen, South Dakota), South America (Matto Grosso in western Brazil, Africa (south east of Central African Republic), Eurasia (north west China), Australia (Alice Springs in the Australian Northern Territory), Southern (Antarctica), Northern (Arctic) and Point Nemo.
Mr Brown reached Point Nemo in April 2024, where he was attacked by an albatross.