HIDROLÂNDIA, Brazil -- Under the shade of ficus trees stands the stone burial chapel that 73-year-old Freud de Melo built. Wind chimes tinkle above the wrought-iron door.

But it isn't a conventional final resting place. Inside the crypt, there's a TV, also a water pitcher and a fruit pantry. Fresh outdoor air flows in through four vents from the chapel roof. Within reach of the coffin are two makeshift megaphones -- plastic cones attached to tubes running out through the wall.

One...