In this case I was looking for a size incongruence. As we can see there are several people walking on the top of the dam that gives us an idea of it's mighty size, on the other hand, I cut the bottom part of for not beeng able to see the end, and luckaly, I think that the dark under part of the mage produced by years of humidity has helped even a bit more to this 'deep' sence of the dam, all together helped by the grand angular, I confess.
I also whant to recall that this dam was constructed in 1968 with forced labour of many political prisoners during Franco's dictatorship, many people died building this mole.
© Xabier Mikel Laburu, Volumen Photo, AZA Press, and/or Bloomberg News