The Grasberg mine in Indonesia is the world's largest and richest gold mine, producing 48 tonnes of gold a year, and has reserves worth an estimated $40 billion.

Big Pit in Wales has been named the best free attraction in the UK and it's easy to see why - it's an incredible, moving and important place that tells the story of modern Britain and the people who w ...

Winding gear can be seen at the Big Pit in Wales, and at the National Coal Mining Museum at Caphouse Colliery, West Yorkshire.