If you have a fascination with the underground, as I do, then this is a book for you. In this book, you'll travel all over the world and explore its caves and man-made underground tunnels. I found it captivating. There were parts of the book that tended to bog down for me. The background on the history of some of the places seemed to be a bit more extensive then my liking. I would just yell in my head... "Just get freaking underground already". Also, the book has pictures but they are black and white and somewhat small. Sometimes it was hard to tell what you were looking at. Other than that, it was a very enjoyable read. Now I want to go caving.

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