Jimbo 2 wrote:
Except, they call them "PIERS" here in Canada.
http://www.geod.nrcan.gc.ca/network_p/cbn/index_e.php
Just click on any dot on map:
The benchmarks in the link above are actually the pillar type if I remember correctly. These were used in the now-archived locationless cache Canadian Base Network.
The link in the other post here was also the basis for a locationless cache for gravity stations but I can't remember the cache name.