Yes. On the Brandywine Battlefield, on occasion I'd what I thought was voices in the headphones. Apparently it was inadvertent radio noise from the Philadelphia Airport being picked up somehow, as I noticed every time it happened, I could see a commercial jet go by.
On the other hand, there is an ancient site on the Susquehanna River not far from me, that just plain feels creepy. No explanation. They even put in a ball park and fields, and it STILL feels creepy. The Spanish got there about 1575, the English by 1610, just for a visit, and the natives about 10,000 years ago.