Where is the world's largest underground laboratory for dark matter searches?

The Sanford Underground Research Facility, or SURF, is located in Lead, South Dakota, in the former Homestake gold mine. Its deep underground location shields experiments from cosmic rays, making it ideal for searching for dark matter and studying neutrinos. The lab is one of the most important underground science sites in the United States and hosts several major international experiments. Deep underground laboratories like SURF are essential because many rare physical events would be drowned out at the surface.