Jay Slater's father and brother have continued searching for the missing teenager with a new team after the official search was called off.
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The 19-year-old from the UK was last seen on June 17, when he disappeared after attempting an 11-hour walk back to his accommodation in Tenerife.
Slater had spent the night in a remote Airbnb with two men he'd met earlier in the trip, having decided to stay out rather than go back to where he was staying with his friend Lucy Mae Law.
He'd left the accommodation early on Monday morning, and had spoken with Law on the phone, telling her he was thirsty and that his phone was critically low on battery.
Slater was not seen or heard from again afterward, and Law reported him missing less than an hour after their call.
Police on the island had spent two weeks searching ravines near where Slater's phone was last known to have been used, but called off the search after no leads were found.
However, his heartbroken family has vowed to continue searching for him, with the public having donated over £50,000 ($64,000) to aid their efforts.
Now, his dad and brother have returned to the location where his mobile phone lost signal along with a search team in order to try and find clues as to what happened to their loved one.
According to reports from the Daily Mail, the pair were joined by a team of seven local hikers and a dog, and spent over four hours searching the difficult terrain.
The group spread out across a long and treacherous path which leads down to the sea below Masca on Tenerife's north west coast as they combed the area, despite the 25 degrees celsius (77 Fahrenheit) temperatures in the area.
The group used whistles to communicate with one another as they combed the steep slopes in the Parque Rural de Teno.
It comes after Slater's family was told on Friday that they would be able to use their own search and rescue teams to look for the teen.
The family previously told Sky News they were waiting for authorities to allow them to use some of the donations they'd received for this purpose, with the Guardia Civil then confirming such teams could be brought in from elsewhere "without any problem" to aid the search effort.
The official search was called off on June 30 after almost two weeks, after no trace of Slater was found.
Slater's mother, Debbie Duncan, also shared her gratitude to those still searching for her son, with a post in the official Facebook group reading: "Debbie and family would like to thank the local hiking group who have worked tirelessly planning routes and searching for Jay they are extremely overwhelmed with the kindness of them all. Thank you."
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