The terrain in the area where Jay Slater disappeared is "complete wilderness" a local travel guide warned.
The search for the missing teen has now entered its sixth day after Slater mysteriously disappeared after a night out on his first-ever holiday without his parents.
The 19-year-old attempted to walk back to his accommodation after missing a bus, a journey that would take 11 hours on foot.
Joe Cawley, a writer on Tenerife.com, warned the Terrain in the area could have proven an issue for the young boy.
Cawley explained: "Masca is one of the prettiest villages in Tenerife, but it's very remote. It's only accessible via an extreme switchback road.
"It clings to the side of the Teno mountains, which is a vast area scarred by lots of ravines and cliffs.
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"I think Masca itself is about 1000m above sea level and it is difficult to access. You need a car to get there. Some trails do crisscross the area, but again, it's very barren.
"It's full of cacti and fallen rocks. It's difficult for even the most adept hikers. But for someone like Jay who's not used to the area, it's got to be a nightmare. It is complete wilderness."
Spanish police have rejected an offer of support from Lancashire Constabulary to help try and find the 19-year-old.
Shedding light on the Cawley explained that the Spanish Police are "entirely capable" and "nothing will be enough until he is found".
He said: "I think in all these kinds of cases, and especially from the family, nothing is going to be enough until Jay is found.
"Even if the British police came over and still Jay was not found, it still would not be enough. It's just a natural feeling, especially from the mother.
"The Spanish police are perfectly capable. They're using expert mountain rescue teams that know this area inside out.
"These are the best people to be on this case, I would imagine."
Speaking to The Mirror, Slater's friend Lucy Law claimed the two people he was last with have "left the country", urging British Police to speak to them.
She said: "We need British police here. I just want to find my mate. He’s been missing three days. It’s not looking good now.
"We feel as though it’s down to us to find him and that we’re doing more than the police."
A Foreign, Commonwealth and Development Office spokesman said: "We are supporting the family of a British man who has been reported missing in Spain and are in contact with the local authorities."
