For most of us, when we want to reminisce about a vacation or a time when we lived in a different city, we flip through photo -- or Facebook -- albums. But when illustrator and graphic designer Christoph Niemann wanted to remember his times in the Big Apple, he decided to illustrate the memories using Legos.

What started as playtime with his kids, then a blog post for the, is now Niemann's new book, "I LEGO N.Y." ($10.17, Amazon): It shows us the difference between regular cream cheese and the spread with scallions, what it's like to wait for the subway, and even the trick to figuring out if a cab is on duty or not. Check out the gallery for a sneak peek of a few of the Lego sculptures -- and his insights on what inspired each one.

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