In fact, it is the grotto through which Silvio Berlusconi's guests arrive by sea at his flamboyant retreat on Sardinia. The existence of the entrance has been known about since 2004 when opposition politicians objected to a series of changes to his villa and estate on the Costa Smeralda, saying they were initiated without planning permission.
But now, for the first time, photographs have been published. The tunnel enables visitors to reach the billionaire TV magnate's hideaway through gates concealing a grotto beneath his villa.
Category: Homes - Celebrity - Government