The Gimnasio Ecológico Lumen is an outdoor gym made of natural products. Branches and roughly cut wood make up the frame of most of the machines, and weights are improvised from recycled containers. The gym, based in Valdespino de Somoza, was built in 2005 and includes parts salvaged from bicycles and boats. This badly translated quote is from the gym's creator.
I made this work of totally artisan form: nothing electrical nor mechanic. My tools were the hammer, the axe, the large drills, the mountain range and the tip, in addition to my humble knowledge like professor of Physical education. I worked three years, crossing escombreras and asking for the citizen collaboration to obtain the elements that soon reciblé (...) This peculiar gymnasium, that was born of the nature, will return to her.
If anyone has any more information, or can translate the quotes more intelligently, then please let us know in the comments.