The Blue Grotto (Maltese: Taht il-Hnejja) is actually a number of sea caverns on the south coast of Malta, east of the fishermen’s harbour Wied iż-Żurrieq in the village of Qrendi. It is located right across from the small uninhabited islet of Filfla.
Every day from sunrise until about 1 pm a unique sight can be observed here. The location of the cave combined with the sunlight lead to the water mirroring showing numerous shades of blue. Several caverns mirror the brilliant phosphorescent colours of the underwater flora; other caverns show a deep dark shade of blue.
The Blue Grotto is a popular destination for tourists on the island of Malta with boat trips to visit the caves, scuba diving snorkeling and rock climbing being the most popular activities here. It also has some typical local restaurants that offer good food with stunning views. The location has been used many times by filmmakers, including a Milky Way advert showing a cliff diver jumping 30m into the sea, numerous promotional videos about Malta, a scene of the 2004 film Troy and most recently in a RAI TV 2 filming for the popular travel programme Sereno Variabile.