Sometimes, places are abandoned for a reason i.e. they’re dangerous, haunted or downright cursed.

But, did that stop one YouTuber from exploring the creepy abandoned catacombs in Paris? Of course not.

Deep below the city of lights lie miles of tunnels – known as the catacombs – that holds the bones of more than six million people.

The catacombs snake 20 metres (65 feet) beneath the streets and are thought to cover nearly 2,000 acres (three miles), but less than a mile of this is accessible to tourists.

Their history starts in the late eighteenth century when Paris became overwhelmed by death and disease, leading to overcrowded graveyards and cemeteries.

By May 1780, Les Innocents – one of the city’s largest cemeteries – was so overstuffed with bodies that the cellar wall of a bordering property split and caused a mass of half-decomposed bodies and disease to flood into the basement.

Can you imagine the smell?

Within months, authorities ordered the closure of the city’s cemeteries and, between 1787 and 1814, their contents were transferred to the abandoned Tombe-Issoire quarries under Paris, where quarry workers then distributed and piled them into the galleries.

Today, tourists can visit around 1.5 kilometres (0.9 miles) of the ossuary, although thrill-seekers often delve deeper into the labyrinth through secret entrances.

Jorden Tually documented the creepy things he found in the abandoned Catacombs of Paris on YouTube (YouTube/Jorden Tually)

One person who’s explored the forbidden tunnels is YouTuber Jorden Tually, who documented all the chilling things he found with his 2.4 million followers.

Armed with his camera, a flashlight and a local ‘expert,’ Jorden climbed through a hole dug out of the side of an abandoned train station and into the catacombs.

As they moved through the tunnels, freezing cold water rose to their knees and the space became smaller and smaller.

The walls were covered in graffiti by previous visitors and, about 30 minutes into their exploration, Jorden admitted that he’d have ‘no idea how to get out’ if it wasn’t for his guide.

“If you’re claustrophobic, this is not the place for you,” he said as they crawled deeper and deeper into the tunnels.

They then came across a wall made out of human bones.

“That’s crazy. I touched a human skull,” Jorden said. “I don’t like that. I didn’t like that. I didn’t like that.”

During his four hours underground, he found a throne made out of human bones (YouTube/Jorden Tually)

But, even creepier is a giant pile of bones known amongst those who visit the abandoned catacombs as ‘bone Jenga.’

“Apparently the bone structure behind me is bone Jenga. People come down here and play it… pull out the bones and hope that the whole thing doesn’t collapse.

“No thank you, hard pass.”

They also found further bones that had been labelled to show which part of the body they’d come from, a throne made of bones and even a Nazi bunker.

After a mind-blowing four hours down in the catacombs, Jorden finally decided he’d had enough and upon leaving said: “This is the one thing I’d probably never do again.”