San Bernardino base line
Correctionville, Iowa straddles the 2nd Correction Line and advertises "Jog down our main street" where there is an offset of several yards at the section line. What most don't realize is the offset between townships on the north and south sides is almost 4 miles, having accumulated convergence across most of the width of Iowa at a latitude 60 miles north of the 1st Correction Line.
Meridian Road in Solano County, just north of Vacaville, California. Mt. Diablo Meridian, of course - and, yes the peak is visible as you proceed southbound.
The Town of Meridian in Sutter County is on the MDM
Then there is the town of Meridian, Idaho on the Boise Meridian.