Describe the Hill-Fort Defences construction.

A "hill fort" is a strategically built structure built for
refuge. The structure is built to follow the contours of a hill, with giant rings of
ditches going around it, so that the fort itself, when looked at from an aerial view,
kind of looks like a bullseye.

There are different types of
hill forts, and here are some of them:

The hilltop contour
-the classic hill fort; an inland location with a hilltop defensive position surrounded
by artificial ramparts or steep natural slopes.

Inland
promontory -an inland defensive position on a ridge or spur with steep slopes on 2 or 3
sides, and artificial ramparts on the level
approaches.

Interfluvial -a promontory above the confluence
of two rivers, or in the bend of a meander.