This culvert is on the National Road, in Frederick County, Maryland, about 1.6 miles east of New Market. This is its south wall.
When driving down the road, you’d miss it if you didn’t know it was there. Interstate 70 is visible in the distance. This view is from the west, looking east.
At some point, some rather clumsy mortar repair was done.
The north wall of the culvert has deteriorated and had dirt filled in around it.