A proposed immigrant detention center in the Everglades dubbed "Alligator Alcatraz" is drawing criticism for its potential effect on the ecosystem.

Florida this week started construction on a migrant detention facility the state is billing as “efficient” and “low-cost” – because Mother Nature will provide much of the security.

Environmentalists objected to the plan to set up “heavy-duty” tents to house undocumented immigrants in one of the country’s most prized natural areas.