There is an interesting museum in Las Médulas.It is advisable to visit it firstly and then chose a path to walk.
UNESCO has chosen this roman gold "mine" as a world heritage object.
Take your time and make a visit.
Las Médulas are situated in Nordwest of León province.Road from Ponferrada to El Barco de Valdeorras.23 kms.away from Ponferrada.
There are many old chest nut trees in Las Médulas.Autumn is the best season to visit it,although there is not problem for the rest of the year.