landmark
noun
[ ˈlan(d)mɑːk ]
• 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"
• an event or discovery marking an important stage or turning point in something.
• "the vaccine is a landmark in the history of preventive medicine"
