Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fascinating...

I was surprised I so enjoyed this series, but it really uncovers aspects of the past I would not have thought of much at all. The host, Don Wildman does a wonderful job exploring hidden underground secrets of major cities, and his enthusiasm is really what gives the program an infectious energy. I would highly recommend this to anyone interested in history and the civilizations of the past who often built the foundations for the greatest cities in the world today