The opening chapters establish the archipelago as the emerged part of a much larger volcanic system in the southern Tyrrhenian Sea. UNESCO inscription in 2000 recognises the islands under geological criterion viii, especially their role in the scientific understanding of Strombolian and Vulcanian eruption types. This is not a UNESCO cultural inscription, although the human record is exceptionally rich.
The central sequence gives each island its own scale. Lipari is read through the Castle, museum, Greek and Roman city, cathedral, confinement history, pumice, obsidian and rural settlements. Vulcano is read through the Fossa cone, Vulcanello, the 1888–90 eruption, hydrothermal activity and present risk. Salina is organised around three municipalities, two mountains, Bronze Age sites, salt production, capers, Malvasia and migration. Stromboli joins inhabited neighbourhoods to persistent activity, historic eruptions, monitoring and civil-protection knowledge.
Panarea, Filicudi and Alicudi are not closing footnotes. Their chapters distinguish fortified prehistoric sites, underwater volcanism, small-island museums, coastal villages, abandoned agricultural settlements, steps, cisterns and the material consequences of living with limited land and changing transport.
Access information is deliberately qualified. Sea conditions can cancel connections; paths, museums, crater zones and boat landings can close; volcanic alert levels and municipal ordinances can change quickly. The guide records the situation checked on 24 August 2026 and directs travellers back to the responsible institutions before every journey.