I was once told that the reason why millions find New York so energizing is because Manhattan sits on a magnetic rock, which literally draws people in. I could never verify that story, but I still like it because “magnetic” and “energizing” are words that definitely fit the bill. Certain grumpy people will tell you that the City is very walk-or-die. True, but here’s the beauty of it: in a city that never sleeps, one never stops walking.