The entrance to Mina Perdigona, now partially caved-in. The mines were filled with rubble after exhaustion to prevent these.	See map.
	The entrance to Mina Perdigona showing the reinforced concrete ribs that were used to support the mine roof. The mine was used for some time after closure for growing mushrooms.	See map.
	Perdigona from Las Menas.	See map.
	What remains of the entrance to Mina Necesaria. Mining activity never stopped in these mines, working by three eight hour shifts, 365 days per year.	See map.
	The reinforced concrete ribs in use in Mina Perdigona.	See map.