I have a soft spot in my heart for trains. There's a new one that features a glass-domed roof that gives you breathtaking views as it transports you all the way through the Rocky Mountains.
We've all grown up learning that the Rocky Mountains mark a continental divide in the waters of America.
Everything east of the divide flows to the Mississippi and down into the Gulf of Mexico, then on to the Atlantic.
Everything west of the divide flows west, to the Pacific...