What material is the outer surface of Gateway Arch made from?
A Stainless steel
B Vibranium
C Brushed aluminum
Correct Answer: Stainless steel
Fact: For the lucky world travelers who’ve seen Gateway Arch in person, this might have been an easy one. For the rest of us, perhaps it’s oddly comforting that the world’s tallest arch has a shell made from the same material used to make the average kitchen spoon.