The fool tears down the wall for want of wit to find the gate.

In 2011, during sewer repairs, workers uncovered the foundations of a 15th-century city-wall tower. Research showed that this tower belonged to a previously unknown second city wall, which protected Nijmegen between 1400 and 1425. Because of this, the tower was named "the lost tower" (Verloren Toren).

The tower was about 13 metres tall, with walls approximately 2 metres thick. Its south side,…

Valencia was never known for its walls.

Unlike Ávila or even Albarracín, these walls don’t enclose the city, nor announce themselves in any showy form. Most of what once protected the city is hidden underground, crumbling between buildings, or so iconic that it's rarely seen as one piece of a much larger fortification system (including one of its most famous postcards, the Torres de Serranos).…