I always thought this looked like a tempting place (even though it really doesn't go very far). The opening is about 5' high and the stonework is limestone.
Looks like an old railroad tunnel I checked out once. It allowed a small stream to go underneith.
There was a dated stone, don't remember the exact date, but was around the 1880's.
Train's still pass over top daily. Those were built to last.
I didnt find anything...too much rubble from years of flooding and such...that one you show...who knows.
Good luck,
Al