Beyond the Walls
The visible remains of a fortress—its walls, gates, and towers—represent only part of the defensive system. The landscape itself was often modified to enhance defense. Learning to read these modifications opens up a new dimension of understanding.
Look for artificial hills (glacis), filled-in moats, unusual tree lines following straight angles, or suspiciously regular ponds. These may all be traces of former fortifications.
The Defensive Landscape
Fortresses didn't exist in isolation. They controlled road networks, river crossings, and strategic heights. Understanding why a fortress was placed where it was requires looking at the broader geography.
Consider sightlines: where could sentries see? What approaches were hidden from view? Where did roads converge? These geographic factors often explain fortification placement better than any document.