Grand Central is definitely one of the most beautiful train stations in the world – and in my opinion the most beautiful. When I first visited the Grand Hall some years ago I was mesmerized by its size, light, ceiling and the hunderds of people rushing from A to B. Whenever I’m in NYC I make sure to stop by at some point, even if it’s just to use their public toilets or to get something to eat (Shake Shack! Junior’s Cheesecake!) at the food court in the lower concourse.
and Atocha in Madrid.