From OpenStreetMap Wiki
|historic = milestone|
|A historic marker that shows the distance to important destinations|
|Used on these elements|
|Status: In use|
|Tools for this tag|
Ais a historic physical marker that shows the distance to the beginning or important destinations. They are usually made of stone, placed along a road. Milestones of abandoned railways can also have this tag.
- format=* squared stone, conus, obelisk, bell
- height=* height above ground in meter
- inscription=* what is written on the milestone
- start_date=#### (year)
Please do not tag name="milestone" just to get it rendered!