Bridge!
Such a marvellous and noble construction. No matter how it looks like, if it is stable it serves its purpose and it is already one magnificent structure. All the math, calculations, statics, safety measures and then all the different materials & looks. Hey, there is so much variety of it, and there are almost no two bridges that look the same underneath, even if it is just a plain concrete block.
And all the fancy architectures - ah I guess that engineers must hate all the architects and their crazy ideas, but still what would be the world without all the interesting & futuristic buildings - they might be a pain in the ass to construct, but they will live on for generations.
And the last photo... I don't know about you, but this reminds me of a futuristic world - that crazy long road/walkaway from one part of the city to the main one on the left side. I can easily see some sci-fi movies being filmed there. :)
co-founder of crowdmind project and crowdwitness operator