This antiquity dig site in Apocrypha, near the Shattered Fate crafting station, did not have the sparkling indicator rising from it like every other dig site I've seen. It is almost impossible to see, since the mound is practically the same shade and texture as the surrounding terrain. I was playing without audio, so I can't confirm if it made the typical noise, nor was I able to use that to track it down. I must have passed it 3-4 times using the eye to get gradually closer. The last time I used the eye, I was within melee range and still couldn't see it. I only found it when I got the prompt to dig as I was walking in that direction.