[citation needed] Both the Wied iz-Zurrieq harbour and Blue Grotto sea caves are located on the coastline opposite to the small uninhabited islet of Filfla,[1] which is a bird sanctuary.

Underwater, different colours of red, mauve, green, orange and yellow give an impressive picture to visitors.

The Blue Grotto is a popular destination for tourists to Malta with boat trips visiting the caves running all days of the year, weather permitting.

Scuba diving on the nearby scuttled wreck Um El Faroud, and snorkelling along the coastline, together with rock climbing, are the most popular activities practised here.

The location has been used many times by filmmakers in big screen and TV productions, namely Hell Boats,[2] Troy,[3] twenty-fifth season of The Amazing Race,[4] "Cadbury Milk Tray" chocolate adverts, and the Rai 2 travel programme Sereno Variabile, amongst other smaller commissions and photoshoots.