"A tour that is absolutely worth seeing!
Theo, one of the crew, speaks German and English very well and is practicing Italian and French.
One piece of information was missing for me personally:
The trip in the channel between the islands can be very rough (depending on the weather). So if you have a sensitive stomach, you should be aware of this!!!
The grottos are also only navigable depending on the weather. Unfortunately, we were unable to reach the first grotto due to the strong waves. We only drove a little way into the second grotto and the swim was canceled here.
All in all, a clear "must-do"!!!"