The Golden Gate Bridge is a famous/familiar 'landmark' in San Francisco.
The moon landing is a 'landmark' in space exploration.
The decision/ruling was a 'landmark' in legal history.
(..) Ladies and gentlemen, if I could have your attention for a moment? I would like to thank all of you for coming on... what I'm sure will be a landmark day for Apex Communications. Today... we begin official use... of a new generation of communication technology. (..)2002 Shark Attack 3: Megalodon