This foundation offer guided routes through the mining area of La Unión The Fundaciòn Sierra Minera is a non-profit organisation which works to preserve the heritage of the Sierra Minera, and also engages in a number of educational activities..

A seven-kilometre walk through the mountains and history of Portmán and La Unión The Carretera del 33 is a seven-kilometre walk through the mountains of the Sierra Minera between La Unión and the coastal town of Portmán, taking walkers on a journey..