Talgarth Tower is a 13th or 14th century square stone tower house, adjoining the bridge over the River Enig. Of three storeys, with the basement below the modern ground level, it was once fortified and guards the river crossing. Later used as prison or lock up, in the 18th century a pyramidal roof replaced the defensible parapet, when the tower was used as a dwelling. To the front and back, are 19th century two storey extensions but visible on the top floor of the tower are lancet windows, gargoyles and machicolations. Internally the tower still retains its original features, of a stair within the thickness of the wall with corbelled vaults over and a garderobe which was later converted into a dungeon. They is also a story of a subterranean passage, leading from the basement to Bronllys Castle.