Etymology of the name: once called “Didyme” (twin). The current name comes from the saltwater lake at Lingua, which in the past was used as a saltern or “salina”.
Volcanic activity: no longer present; however, there are a number of post-volcanic phenomena such as the “sconcassi” or gas emissions, and the thermal springs.
Age: it is one of the oldest in the archipelago, second only to Filicudi. Volcanic activity began 500,000 years ago and ended 13,000 years ago.