Above is a picture of the Amon Sul, or Weathertop ruin I constructed by following the guide in the Fellowship of the Ring Journey Book , from GW.
I tweaked it a bit, added bigger arched ruined sections, and added a brick exterior finished by etching a clad layer of polyfilla. Loborious work, but the result is worth it.
You can see the whole process here:
Amon Sul is the great watch tower that was roughly at the junction of the three ancient realms of the greater Kingdom of Arnor; Cardolan, Arthedain and Rhudaur. As these rival kingdoms fought and weakened each other, they were eventually all destroyed in subsequent wars with the armies of the Witch King of Angmar, the leader of all the nine Ringwraiths. During this final conflict the tower of Amon Sul was thrown down, and only its weather beaten ruin remained in the time of Frodo and the Ring.
It is here that Frodo, is mortally wounded by Witch King of Angmar with a Morgul blade, and it is only by a desperate fight led by Aragorn that the wraiths are thrown back long enough for an escape to be made, and a desperate flight to the Ford of Bruinen ensues. Finally Frodo is brought to the healing hands of Elrond in Rivendell, and his life is saved, though he will always bear the scar and memory of the wound.
Found some old WIP shots:
Although I changed it after this to make the 'archways' rather than the small broken column stumps...