Villa Winter

The villa was designed and built by Gustav Winter, a reclusive German engineer, born in 1893 in the Black Forest region of Germany.

Gustav Winter worked in Spain after 1915, and was active in different projects in Fuerteventura and Gran Canaria, including building an airstrip.

The main theory involves the fact that the villa had a tower with an electric lantern installed in its turret, similar to a lighthouse, and that it was used to signal German U-boats.

[2] The program showed tunnels and rooms in the basement under the house, some built with walls 1.4 metres (4 ft 7 in) thick, and with arched ceilings, said to be effective at resisting explosions.

The current resident and caretaker, Pedro Fumero, who was interviewed in the documentary, claimed to have played in the basement as a child, and saw shackles there in a windowless room just wide enough for a person's arms to be affixed to opposite walls.