Torreta de Guardamar[1] (Valencian: [toˈreta ðe ˌɣwaɾðaˈmaɾ], Spanish: [toˈreta ðe ˌɣwaɾðaˈmaɾ]) or Torre de los Americanos[2] is a 380-metre tall[a][2][7] guyed radio mast erected by the US Navy near Guardamar del Segura, Spain.

Torreta de Guardamar is a mast radiator insulated from earth, and is used to transmit orders to submerged submarines.

The transmitter using Torreta de Guardamar as antenna had been, since its inauguration, remotely controlled by the US Naval Communication Station in Rota.

Then it was transferred to the Spanish Navy, and is used for transmitting orders to submerged submarines stationed in Cartagena during their operations.

As opposed to other VLF transmitters such as the DHO38 in Rhauderfehn, it has no fixed frequency allocation by ITU and carries no callsign.