An arduous coach trip brought us here through the terrible Malta traffic from Valletta, but this review is about the grotto tour, not the traffic, but you do have to get there somehow.
It actually amounted to about 15 - 20 minutes on a small boat motoring non-stop through and round a series of caves in the cliffs. A bit of time to look properly would have been nice. Some of them showed very clear blue water, some of them didn't. The boat driver got mixed up over the name of which particular cave we were in at any time (was he making it up as he went along?) but it didn't really matter.
But it was a hot sunny day and the trip was a pleasant and welcome relief from the coach tour.
We were rather worried about the H & S aspect. Lifejackets were to be worn but didn't fasten properly and would have been dangerous if they were needed, and there were at least a score of divers and snorkelers in the water that the boats picked their way through.
There was just one local trying to sell tat to the tourists - so less than at most 'attractions'.