Jay Slater's last known-location was Teno Rural Park in the north-west of Tenerife - a popular hiking spot for tourists.
Now a desperate police search is underway, with cops and mountain rescue scouring the rugged landscape with drones and police helicopters.
Do you have information about missing Jay? Get in touch on 07741005808.
Jay Slater, 19, from Lancashire, was on the holiday island for a three-day music festival and had stayed the night with people he had just met before disappearing on his way home on Monday.
He vanished after making a desperate phone call at 8am on Monday morning to his long-time pal Lucy - saying he was in the "middle of nowhere".
The frantic teen said he was lost, needed water and only had 1 per cent battery left on his mobile phone.
