Castillo di Coca (Spain)

The Coca Castle (Castillo de Coca), located in the eponymous town of Segovia, is the most famous castle of the Spanish region of Castilla y Leon, whose name derives from the presence of many fortified buildings. The Castillo de Coca is characterized by being built of brick, with polygonal towers and crenellated ramparts. It was built in 1453 by Alfonso de Fonseca and was later sold to the Duke of Alba, which still belongs to the family. And 'known for its particular acoustics circular room located in the tower of Pedro Mata: whispering some words next to the wall on one side of the room, they are perfectly audible even from the opposite side.