Brazil has hundreds of millions of cows, but one in particular is extraordinary. Her massive, snow-white body is watched over by security cameras, a veterinarian and an armed guard.

Worth $4 million, Viatina-19 FIV Mara Movéis is the most expensive cow ever sold at auction, according to Guinness World Records. That's three times more than the last recordholder's price. And — at 1,100 kilograms (more than 2,400 pounds) — she's twice as heavy as an average adult of her breed.