I'm Ayesha Roscoe and you're listening to the Sunday story from up first.
So we've come in through the back now.
Security guards stopped us.
They didn't allow me to take any photos.
Earlier this year,
investigative reporter Shabani Matani visited a massive industrial complex outside of Cambodia's capital, Penang Pen.
It's set up like an office park, but it's fortified against the outside world.
There's barbed wire all around, CCTVs.
You can see lookout posts as well on the top of the buildings.
People once lived here, about 20,000 of them.
Looks like dormitories, sort of white buildings with black rails.
With bars on the windows.
And it's clear that it was abruptly abandoned.
So much trash.
It's a whole little city.
I mean, Times Square could fit in this.
So all of these are hallmarks of a scam compound.
This cyber scam compound is among dozens in Cambodia that operated with impunity for years.
Migrants were brought to these places from throughout Asia and Africa
and put to work scamming people on the other side of the world.