The first time Joo attempted to enter Tyson's abandoned mansion, he and a friend were arrested and given fines before they even got inside.
The second time around they got permission to explore the place.
The mansion, which Tyson lived in in the 1980s and '90s, sat vacant since 1999, until late last year when it was finally sold. "I had obtained permission from the current owner to document restoration progress," Joo says. "It's still in very good shape."
The new owners plan to turn the five-bedroom, seven-bathroom estate into a church and a community center.
Yet all Joo could think about when he was inside was "how many strippers hung out with tigers and all had wild parties."
"It's quite a contrast that it is soon to become a church, but quite a cool shift," he says.
Joo says the tiger cages and basketball courts emblazoned with Tyson's name are intact.
This living room used to have garish black and white tiger-striped carpeting, large pieces of furniture, and huge TVs.
The pool, now mostly drained, is housed inside a massive structure.
"The pool was bigger than like three of my houses," Joo says. According to People magazine, it's shaped like a boxing glove.
A gaudy part of the mansion is Tyson's green stone and gold bathroom.
From his tub, Tyson could see out on to his massive property.
Vandals have gotten to the house. "I'm sure at this point, most of the world is in the know of this mansion, and many are very intrigued by it," says Joo.
"I love researching and documenting abandoned places, so of course a former world famous boxer's home would be on my list of things to photograph," Joo says. "The history and stories behind these places always fascinates me."
"So many things ... are forgotten so easily," he says. Joo calls his work "historical preservation through photographs."
"I enjoy the pure feeling of an eerie but calming silence, being tucked away from any life on the outside, while nobody knows you are there. It feels almost like life after humans, so quiet, and you can learn so much, coming to peace with the world around," he says.
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