Miner helmets, former mine of Bocamina San Ramon, historic town of Guanajuato, UNESCO World Heritage Site, Province of Guanajuato, Mexico

america american bocamina construction cover former guanajuato hard hardhat hardhats hat hats helmet helmets heritage historic inboard indoor indoors industry inside interior internal mexican mexico mine miner mines mining nobody north of photo protection province ramon safety san shelter site sites town unesco world