For anyone looking for an epic Halloween scare, one might want to pay a visit to McKamey Manor in California, a haunted house said to be so terrifying and vile that no one has ever finished it - ever.

Dubbed the world's scariest haunted house, McKamey Manor, based in San Diego, is free of charge, requires guests be over the age of 21 and accommodates only two visitors at a time, Caters News Agency reported.

What awaits inside is a horrific interactive experience, which includes gagging, being tied and locked up, having your head forced into cages full of snakes and being forced to eat rotten eggs. Other guests have had live tarantulas walk across their faces. The whole experience lasts anywhere between four and eight hours.

"Nothing is like what we do," the owner, Russ McKamey, told Caters News. "It's like living your own horror movie."

McKamey does background checks on each haunted house prospect before giving the OK, which probably explains why he has a waiting list with over 24,000 people. Visitors are required to sign a waiver.  

The 55-year-old, who is a huge fan of movies like "Texas Chainsaw Massacre" and "Psycho," came up with the idea for the haunted house 14 years ago. Since then, he and his girlfriend, Carol Schultz, have spent over $500,000 scaring the life out of thrill seekers, including one marine who could not finish the experience.

"I consider the people who take part in these haunts as my friends because I research and spend time with them before they go on the haunt," McKamey told Caters News. "Everything is interactive: the experience- and the challenges- are to prove what you can and can't do."

The entire McKamey Manor experience is recorded, so anyone can watch the gruesomeness unfold again and again.