A convoy of trucks carrying tents, construction materials and portable toilets flows into a virtually abandoned airport in Florida's picturesque Everglades, a UNESCO World Heritage Site.

But they're not helping build the region's next big tourist attraction.

Instead they're laying the foundations for a new migrant detention facility, dubbed "Alligator Alcatraz".

The facility, in the middle of a Miami swamp, was proposed by state lawmakers to support US President Donald Trump's deportation agenda.

"You don't need to invest that much in the perimeter. If people get out, there's not much waiting for them other than alligators and pythons," explains the state's attorney general, James Uthmeier, a Republican, in a video set to rock music and posted on social media.