Hidden gems abound in PA…and so do some little-known secrets. Like an entire military facility tucked away in a state forest during World War II. Only a select few, including those who worked there, knew about the Prisoner of War Interrogation Camp in what is now Michaux State Forest.

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Have you ever gone on a self-guided walking tour of these ruins in Pennsylvania? What was the experience like for you? Share in the comments below! Click here to read about eight hiking trails that will lead you to extraordinary ruins in PA.

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