Redoubts
A castle. A Martello Tower. A fort.
ridgeway
ridgeway
agora
Hilltop Hoods -- The Hard Road
A Pointed Hilltop is called A Peak.
Enrichment
A fortress at the top of a hilltop, or A.K.A. the hilltop. :P
That phenomenon is called "visual compression" or "foreshortening." It occurs when the distance to a visible object appears shortened due to the angle from which it is observed, such as when viewing a hilltop from below.
A hill crest is commonly referred to as a hilltop or summit.
The motto of Hilltop High School is 'The Focus at Hilltop is Academics'.
Masada fortification is located in Israel in the Southern District. The Masada fortification is an old and historic fortification that dates back to the first century.