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The Gateway Arch is a 630-foot-tall (192 m) monument in St. Louis, Missouri, United States. Clad in stainless steel and built in the form of a weighted ...
In literature, an archenemy or archnemesis is the main enemy of someone. In fiction, it is a character who is the protagonist's, commonly a hero's, ...
An arch-gravity dam or arched dam is a dam with the characteristics of both an arch dam and a gravity dam. It is a dam that curves upstream in a narrowing ...