Everything we know about Scientology's alleged 'prison camp' known as 'The Hole'

Between the "Going Clear" book and movie, Leah Remini's hit A&E docuseries, articles, and memoirs from former members, we've learned a lot about what ex-members say is Scientology's alleged prison for executives who have fallen out of favor with the organization's leader, David Miscavige.

"It was a poisonous environment," "Going Clear" author Lawrence Wright said of "The Hole" on the HBO documentary. "People were really frightened. And this went on for years. This wasn't a couple of days."

"He literally created this prison camp," Marty Rathbun, a former executice who left Scientology in 2004, said in "Going Clear" of his time in the Hole. "It was inevitable that I wasn't going to last there."

Here's everything we know about Scientology's alleged "prison" known as the Hole: