In this rapidly evolving world there are so many modern infrastructure have been constructed by our engineers. The most inspiring thing about the structures is the story and struggle behind its construction, which really intrgued me when I saw the documetory of the structure named as the Capital Gate.
I like the Brooklyn Bridge. It is composed of many "firsts" in bridge construction, and has an interesting story behind its engineering and construction. Plus it's still standing after being converted to handle 6 lanes of NY traffic. That's an engineering feat for something built in 1883.