Blue Grotto

Photograph by Anas Morsali, taken during his own trip

The Blue Grotto (Il-Hnejja) is a series of spectacular sea caves on Malta's southern coast near the village of Żurrieq, renowned for the mesmerising phosphorescent blue light that illuminates the water inside. The main cavern, a soaring limestone arch approximately 30 metres high, channels sunlight through the water in a way that creates an otherworldly electric blue glow, caused by the reflection of light off the white sandy seabed and the underwater flora. Traditional brightly painted Maltese fishing boats (luzzu) ferry visitors from the small harbour at Wied iż-Żurrieq into the caves — a journey that takes approximately 25 minutes and passes through six caverns, each with its own character and colour palette. The caves are best visited in the morning when sunlight enters at the optimal angle, creating the most vivid blues. From the clifftop viewpoint above, the panoramic view encompasses the caves, the tiny offshore islet of Filfla (a nature reserve), and the dramatic limestone coastline stretching in both directions. The surrounding area is also excellent for snorkelling and diving, with underwater caves and marine life including octopuses, groupers, and colourful wrasses.

Planning the wider trip? The Malta planning guide covers how to get there, how to move around, where to stay, realistic costs and a day-by-day itinerary that includes Blue Grotto.