The City of Gold, commonly known as Egoli or Jozi, is capital of the province of Gauteng, meaning place of gold. South Africa’s gold deposits amount to almost half the deposits on the planet and the country has two of the world’s deepest mines at Boksburg and Carletonville. These two pits are more than 3.5km deep and at the bottom the rock temperature is 60 degrees Celsius. Although the gold mines have reduced their output over the last ten years, South Africa remains the world’s second largest gold producer. Every week a flight from Johannesburg to London, too heavy with gold bars to make it to Europe without stopping, lands at Ilha do Sal in the Cape Verde Islands to refuel.