Actually other way round. Caches very near milestones. See other lists of street furniture.
Do you know of any other caches not on the lists, near or involve milestones, fingerposts or toll houses and other boundary markers?
There is link on milestone site to this list.
Forum Thread - information on putting a link on your cache page.
Some Travel Bugs have been released whose purpose is to visit as many caches as possible at milestones and other roadside furniture.
Show all GCs on list on map.
Create Pocket Query of list. PQ can be seen on Geocaching.com map on a cache page by choosing PQ tab and selecting your MS PQ.
About Bookmark Lists
A bookmark list is a user defined collection of listings. They can be used as to do lists, watch lists, a way to organize listings you find, or whatever you decide. You can keep them private or share them with others.
Bookmarks can be added on the page for the listing or on this page using the waypoint name.
Bookmark names may be different than the actual listing. Click on the listings to see the actual names.