From soaring man-made monuments to jaw-dropping natural landforms, the U.S. has a wealth of beautiful landmarks. (iStock) Nearly a million New Yorkers rush through Grand Central Terminal to and from their desks every day, barely taking notice of the spectacular Beaux-Arts building that surrounds them. First-time visitors to the terminal, though, may find it hard to imagine taking such an architectural masterpiece for granted: with its massive, echoing main concourse, soaring multipaned windows, and vibrant astronomical ceiling mural, it’s one...