Measuring 10.5 metres north to south and 9 metres east to west, this medieval fortification has been repurposed over the centuries; its ground floor currently serves as a cattle shed with a concrete floor. The most striking feature is an unusually wide and high doorway in the south wall, measuring 2.36 metres across and approximately 3.5 metres tall, though this is clearly a later insertion rather than the tower’s original entrance, which has left no trace.

The interior reveals fascinating architectural details that speak to its defensive past. The ground floor chamber contains blocked double-splayed windows typical of medieval construction; one in the west wall is missing its light entirely, whilst another in the east wall retains its narrow lintelled opening. A central door in the east wall, now partially blocked, once provided access to narrow mural stairs that wound up through the wall thickness to the second floor, though a breach at the base now interrupts this route. The first floor houses a single chamber covered by a rounded barrel vault running north to south, where you can still see traces of the plank centring used in its construction. This level was lit by a lintelled window in the north wall, now blocked up.

The tower’s construction shows defensive features common to such structures, with a slight base batter on the north, east and west walls for added strength, though curiously absent from the south wall. This south wall is less than half the thickness of the others and appears to have been completely rebuilt at some point. Whilst little is known of the tower’s early history, documentary evidence shows that ‘Dowanestowne’ was included in a crown grant of land to David Lord Roche in 1611, providing at least one historical anchor point for this enigmatic structure.