How does Switzerland keep the grim realities of gold mining under wraps? Gold, the enduring safe investment and symbol of wealth, comes at a high price.
Mined in slave-like conditions, it has been linked to everything from funding civil wars in Africa to causing environmental disasters in Latin America.
The industry has been protected by the Swiss state for more than a century, and turning a blind eye here is standard practice.
Despite attempts at reforms, a lack of transparency still remains. We travel to Peru, Congo, Dubai and Switzerland to investigate.