Three of just about anything,:

• gunshots
• fires
• piles of rocks
• blasts of a whistle
• flashes of light

is the universal "distress signal" It can also be a warning signal.

I'm pretty sure you were on sacred ground, maybe burial, or ceremonial, on which the spirits do not allow trespassing. The sounds you heard, were not even real sounds, just what the spirits could concoct to give you fair warning from coming closer.

Do yourself a favor, and stay away.

Dump truck tailgate slamming shut....even miles away will make you think, what the H was that?

Usually 3 to 4 bangs.

Given the complete content of this entire thread, you just did. Your hopes were indeed realized by this reader.

It was surely a Raven
Any outdoors worth his salt knows this and has heard it
If you can just listen to nature, she will reveal all the answers
But most are to fast paced and can't hear her talking

I am prety sure it was me falling down,,,,,,,sorry to startle ya.... I thought we was cosines...............................