They are organising a marathon 10 km long in the underground installations of the Barcelona Metro routes.
This event, called Discovery UNDERGROUND BARCELONA 2014 creates a pioneer experience in the world which is limited to 300 participants only.
It will take place in the dawn between 28th and Friday 29th of August 2014.
This is the second time that this event will be organized. Participate and be one of the protagonists!
in this video you can see a summary of the first edition
For more information or to sign up to be one of the 300 participants click here