The main difference between Landmark and Milestone is that the Landmark is a recognizable natural or artificial feature used for navigation and Milestone is a numbered marker along a road or boundary
A landmark is a recognizable natural or artificial feature used for navigation, a feature that stands out from its near environment and is often visible from long distances.
In modern use, the term can also be applied to smaller structures or features, that have become local or national symbols.
A milestone is one of a series of numbered markers placed along a road, railway, canal or boundary at intervals of one mile or occasionally, parts of a mile. They are typically located at the side of the road or in a median or central reservation. They are alternatively known as mile markers, mileposts or mile posts (sometimes abbreviated MPs). Mileage is the distance along the road from a fixed commencement point. Commonly the term “milestone” may also refer to markers placed at other distances, such as every kilometre.
Milestones are installed to provide reference points along the road. This can be used to reassure travellers that the proper path is being followed, and to indicate either distance travelled or the remaining distance to a destination. Such references are also used by maintenance engineers and emergency services to direct them to specific points where their presence is required. This term is sometimes used to denote a location on a road even if no physical sign is present. This is useful for accident reporting and other record keeping (e.g., “an accident occurred at the 13 mile mark” even if the road is only marked with a stone once every 10 miles).
A recognizable natural or man-made feature used for navigation.
A notable location with historical, cultural, or geographical significance.
A major, important event.
To officially designate a site or building as a landmark.
A stone milepost (or by extension in other materials), one of a series of numbered markers placed along a road at regular intervals, typically at the side of the road or in a median.
An important event in a person’s life or career, in the history of a nation, in the life of some project, etc.
To place milestones along (a road, etc.).
To plan out a project as a series of major steps.
an object or feature of a landscape or town that is easily seen and recognized from a distance, especially one that enables someone to establish their location
“the spire was once a landmark for ships sailing up the river”
a building or monument of historical importance
“the entire town has been designated a National Historic Landmark”
the boundary of an area of land, or an object marking this
“at certain points of the boundary the men would beat the landmark with their sticks”
an event or discovery marking an important stage or turning point in something
“the vaccine is a landmark in the history of preventive medicine”