The Memorial is located between the Hill Cumorah and the Sacred Grove, so everyone driving between these locations passes it.
The Memorial features panels explaining President Cowdery's connections to this area. Route 21 is the road to Canandaigua that he referred to in Letter VII.
The Memorial also features Letter VII itself, along with statements from the prophets about the New York Cumorah. It explains the three reasons to visit Cumorah.
Incredibly, visitors to the Hill Cumorah currently are told only that Joseph found the plates on this hill. Visitors wonder why there's even a visitors center there. It's so sad to see bus loads of visitors, including youth, come all the way to the Hill Cumorah only to be misled about what the prophets have taught.
In recent years, thanks to revisionist Church historians who are systematically erasing Church history to accommodate the M2C intellectuals, visitors are not told about (i) Mormon's depository in the hill, or (ii) the great battles fought in the mile-wide valley west of the hill. These were the final battles of the Jaredites and the Nephites.
Now, visitors to Palmyra can at least learn the truth about what the prophets have taught about the New York Cumorah, starting with Letter VII and continuing through General Conference addresses by members of the First Presidency.
Finally, the Memorial shows how the New York Cumorah fits in the overall Book of Mormon geography in North America.
If you come to Palmyra, be sure to stop by the Oliver Cowdery Memorial.
Plus, there's an art studio on the same property with some new paintings depicting Book of Mormon people and scenes.