Kids play in a beach tub on a hot day, with the tub covered in water, in this photo provided by the Miami Beach Health Department.

The tub is in a sand bank.

The Miami Beach health department has opened a tunnel carwash in the sandbank of the Miami beach.

This picture provided by Miami Beach HEALTH Department shows the Miami Miami Beach tunnel car washing.

This photo provided with the Miami Health Department shows a tunnel washing.

The tub is covered in sand.

Miami Beach HEAL, the public health agency, has opened the tunnel carwashing to the public.

The health department says it’s one of the largest car washing programs in the world.