The urban fortifications, with castle to the south, delimits the primitive settlement on top of the mountain, at about 502.9 metres (1,650 ft) altitude.
On the northern flank supported the town, called the Arrabalde, and rest of the flanks are occupied by agricultural fields, with olive orchards, broken by the Ribeira de São Pedro (also called Ribeira do Ninho d'Açor) in the west.
The location of the fortifications, at the top of the mountain, makes it an ideal lookout over the vast landscape below.

Much of the walls are in a state of ruin; yet, there are several trenches still conserved, including the "Vila" Gate, a prototype of typical Gothic gates.
The castle comprises an irregular plan, delimited by the "Vila" Gate in the north and along the east the "Traitors'" Gate (also called the "Sun" Gate).
At this point there are ruins in east that could have been the keep tower, with cistern and pavement with door to the south.
Over the cistern is another pavement above the stairs the extend from the patio.
The tower appears to have been divided in two from the cistern.
To the west of the tower is a small tower and terrace that opens to a patio.
In the south/southwest of the castle are the remains of a cubel/watchtower, with a rectangular surface, that accessible from a staircase addorsed from the southern wall.
Much of the interior of the castle is occupied by rocks and unlevel ground.

The urban walls, extend from the cardinal directions from the castle: two walls to the southwest (extending from the "Santana" Gate); west from a cubel, that continues to the north; the wall, then, inflects towards the east-southeast (at the Rua do Forno Gate); connects to the "Villa" Gate between two corbels, continues along to the a cubel in the east (with only minor interruption); before inflecting to the south, connecting the castle and terminating in the southwest.
The urban fortifications, with castle to the south, delimits the primitive settlement on top of the mountain, at about 502.9 metres (1,650 ft) altitude. On the northern flank supported the town, called the Arrabalde, and rest of the flanks are occupied by agricultural fields, with olive orchards, broken by the Ribeira de São Pedro (also called Ribeira do Ninho d'Açor) in the west. The location of the fortifications, at the top of the mountain, makes it an ideal lookout over the vast landscape below.
Much of the walls are in a state of ruin; yet, there are several trenches still conserved, including the "Vila" Gate, a prototype of typical Gothic gates. The castle comprises an irregular plan, delimited by the "Vila" Gate in the north and along the east the "Traitors'" Gate (also called the "Sun" Gate). At this point there are ruins in east that could have been the keep tower, with cistern and pavement with door to the south. Over the cistern is another pavement above the stairs the extend from the patio. The tower appears to have been divided in two from the cistern. To the west of the tower is a small tower and terrace that opens to a patio. In the south/southwest of the castle are the remains of a cubel/watchtower, with a rectangular surface, that accessible from a staircase addorsed from the southern wall. Much of the interior of the castle is occupied by rocks and unlevel ground.
The urban walls, extend from the cardinal directions from the castle: two walls to the southwest (extending from the "Santana" Gate); west from a cubel, that continues to the north; the wall, then, inflects towards the east-southeast (at the Rua do Forno Gate); connects to the "Villa" Gate between two corbels, continues along to the a cubel in the east (with only minor interruption); before inflecting to the south, connecting the castle and terminating in the southwest.
Castle of Alegrete