Sardinia is now home to the largest Radio Telescope in Italy and among the five largest in Europe. With a 64 metre diameter dish supporting frequencies between 0,3 to 100 GHZ it truly is a colossos. The fully steerable telescope was completed in 2011 near San Basilio in the province of Cagliari

So what is a Radio Telescope?

"A radio telescope is a form of directional radio antenna used in radio astronomy. The same types of antennas are also used in tracking and collecting data from satellites and space probes. In their astronomical role they differ from optical telescopes in that they operate in the radio frequency portion of the electromagnetic spectrum where they can detect and collect data on radio sources".

That was the definition according to Wikipedia. Any clearer? Well here's the definition as supplied by the Kids Online Dictionary

"astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources".
So it appears that The Sardinian Radio Telescope (or SRT as it's know) as well as being deployed for Radioastronomy, Geodynamics and other space-related matters it's also looking for Extra-Terrestrial life - Aliens!. 

Arecibo radio telescope
The SRT is financed by the Autonomous Region of Sardinia and the Italian Space Agency.
Its management is shared between Cagliari Observatory, the Institute of Radioastronomy in Bologna and the
Arcetri Astrophysical Observatory in Florence.

The largest Radio Telescope in the world is the Arecibo radio telescope located in Arecibo, Puerto Rico. It has a dish diameter of 305 meters! The ART was also featured in the Bond Film GoldenEye.

The SRT is open to sightseers and holiday makers all year round