Steen Nodwell, 29 from Weston-super-Mare, Somerset, was on holiday with friends in the coastal resort of Salou on Friday night. However, while abroad, Mr Nodwell said he was chased by a group of men.
The father-of-three says he was attacked then pushed off a cliff and left with a fractured skull and broken arms.
His sister Bethan says he is now stranded in a Spanish hospital in the nearby city Tarragon and has required multiple operations.
Mr Nodwell’s medical insurance will only cover the cost of medical surgeries, so the family will have to raise the funds for him to be driven back.
Ms Nodwell told ITV News West Country: “The biggest concern is the fractured skull and eye socket. They want to operate on that first in Spain.
“He’s got a shattered cheekbone, a broken jaw, two broken arms, internal bleeding and he needs to be seen by a neurologist to determine more.”
On a GoFundMe page, she also wrote: “Hi, I’m Bethan. This fundraiser is in aid of my brother who was left for dead whilst holidaying in Spain.
“Steen is a strong and determined man and this incident showcases that.
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“He needs several surgeries all of which are covered through his GHIC card thankfully.
“However there are other expenses that we need help with.
“Steen cannot fly home due to his injuries and won’t be able to fly for over a year (low flying not an option either).
“It is an 18 + hour journey that is expected to be done in a car. We need to raise funds to be able to find suitable travel with medical assistance.
“Not only that but Steen needs help and support from his family who will need to be with him.
“Meaning travel expenses are soon going to mount up.
“Whether you help with a penny or a pound, every little helps. Or even a share of this fundraiser. Our family appreciates it all.
“Anyone that knows my brother knows his strong character, I have no doubt he will handle this better than anyone I know.
“But let’s make it as comfortable as we possibly can. thank you.”
As of writing, the family has raised £6,877 out of a goal of £10,500.
On Tuesday, Ms Nodwell said: “Thanks everyone for all your support so far!
“We have now received our first quote for an ambulance to bring Steen back, so I am going to update the goal accordingly.
“Anything we achieve is overwhelming and Steen can’t believe the support he has been shown.”