There are certain cities that feel like they find you, not the other way around. Edinburgh was one of those places for me—a city where, without even trying, I felt entirely in sync, like I'd shown up exactly when and where I was meant to be. More than once, wandering its storybook streets and gazing up at those jaw-dropping spires and neoclassical facades, I overheard fellow visitors (often in unmistakable American accents) saying, “I still can't believe this is real.” And to be honest,...