In Klerksdorp, South Africa, sits the world’s largest rhino farm, home to 1,300 rhinos, or a little more than 4 percent of the world’s rhino population.

Photographer Brent Stirton, who grew up in South Africa, says, “You would maybe see three or four together in the wild … You wouldn’t see this.”

The farm is owned by John Hume, who breeds the rhinos for their horns. As Stirton points out, if you look closely, you can see that the rhinos in the photo have recently had their horns cut.

Rhino horn is more valuable than gold, meaning Hume has been able to make a living through trading—the approximately five tons of horns he has in storage could bring him around $50 million in