The classic is the Evening Pitch on Redmire Pool. Tony Miles and other writers have described their experiences whilst bivvied at this spot.
How water in the kettle has frozen solid on a warm September night. How a huge green goggled eyed monster has been seen and strange shadows that have moved around.
Redmire is very old, and according to he classic book "Redmire Pool" by Kevin Clifford and Len Arbury, the dam wall was probably constructed at some time in the early 17th century. I have heard tell that the pool was used to dunk nagging women using the ducking stool. If this was true, there is no doubt that some of them may have drowned.
I have had the odd strange experience whilst out fishing. Once in South Africa, the other whilst fishing the River Leam near Hunningham. The latter experience took place in broad daylight!