Nearby, across the road, a little north, a little east:
Looking down into the wetland, there's a culvert - for a spring just below this Stone Feature?
Along another road:
A single stone turtle (head inclusion in another stone)? Is that a right foreleg?
There are smaller stones on those distant boulders:
Zooming in, trimming the turtle beak off accidentally:
Is that a turtle? Is that a right foreleg?
Another sort of entry way?
The kind that uses a turtle as a step?