One of the main characteristics of the Aeolian archipelago is the enormous difference in colours, morphologies, landscapes and vegetation between one island and another.
The main reason is the volcanological history of each island. Only Stromboli, the newest island to emerge from the sea, has the classic cone shape, like how we imagine a volcano to be. The other islands are more irregularly shaped, and this is the result of the overlapping of several volcanic structures in time and space. For example, the island of Salina, the second largest in terms of surface area after Lipari and also known for its twin mountains, was actually formed by the overlapping of at least 6 main volcanic structures.
If we were to count all the volcanic structures above sea level in the Aeolian Islands, we would reach more than 50. If we then added the underwater volcanoes , we would reach almost 100 volcanoes belonging to the Aeolian archipelago!