The Faraglioni make Aci Trezza look like a place born from myth. Its more revealing story begins at the harbour, where boats, fish stalls, a church and a street of cafés share a small stretch of lava coast. The rocks offshore are real volcanic formations; the Cyclops belongs to the story people have placed around them. Aci Trezza is at once a fishing settlement, a literary landscape and a lived-in coastal district of the Comune of Aci Castello.
Know which population figure you are reading
Aci Trezza is a frazione, not a separate municipality. ISTAT’s resident estimate for the entire Comune of Aci Castello was 17,482 on 1 January 2026. That total includes the other localities in the municipality and must not be presented as the population of Aci Trezza alone. The village lies on Sicily’s Ionian coast, north of Catania, beside the small archipelago that gives the Riviera dei Ciclopi its name.
A harbour built for a new settlement
The municipality’s historical account places Aci Trezza’s beginnings in the late seventeenth century, when the Riggio family promoted a settlement at the shore as an outlet for inland Aci. Sailors from neighbouring communities were encouraged to move there. A landing place, church, defensive towers, warehouses and a local administration followed; that administration was formally established in 1691. In the middle of the eighteenth century, the harbour had become one of Sicily’s significant small ports, moving fish and other goods through a network that reached beyond the coast. Commercial fortunes later weakened, and in 1828 Trezza became part of the Comune of Aci Castello.
This chronology matters because the ancient scenery can tempt visitors to invent an ancient town. There is evidence of much earlier navigation in the surrounding waters, including submerged archaeological finds, but the settlement of Aci Trezza itself is documented as a community founded in the modern period. The local story is one of people building a livelihood around an unusually sheltered shore.
Volcanic stone, protected sea and the Cyclops story
Isola Lachea and the Faraglioni are not pieces of a broken mountain thrown into the sea. Geologists describe them as submarine volcanic intrusions, formed as magma cooled in ancient seafloor sediments; the rock is associated with the early, pre-Etnean volcanic history of the area, about half a million years ago. Columnar basalt and pale sedimentary caps give the stacks their striking contrast. Their shape became part of a local retelling of Homer: Polyphemus hurls the rocks at Odysseus. It is a powerful landscape legend, not a geological explanation or proof that a Greek or Roman town stood here.
The island and stacks are part of the Isola Lachea and Faraglioni dei Ciclopi integral nature reserve, while the coastal waters belong to the Isole Ciclopi marine protected area. The reserve safeguards marine and island habitats, including a locally endemic wall lizard. A small University of Catania museum on Lachea holds natural history, geological and archaeological collections, but the university currently lists it as temporarily closed to the public. Visits to protected ground and water are regulated, so do not assume that landing, swimming, diving or boating is unrestricted.
Verga’s fishermen and the village on foot
Giovanni Verga made Aci Trezza famous far beyond Sicily. His 1881 novel I Malavoglia follows a family of fishermen in a community shaped by debt, weather, work and family obligation. Luchino Visconti later filmed La terra trema here in 1948, using local fishers and the village setting. The Casa del Nespolo, a mid-nineteenth-century house adapted as a small museum, brings together the literary memory and objects connected with the film. Check with the Comune for its current opening arrangements before setting out.
Walk the lanes behind the seafront rather than staying only on the waterfront. The seventeenth-century church of San Giovanni Battista faces the old harbour and honours the village’s patron saint. Near the centre, the Bastioncello is a coastal lookout tower dated to 1672, now absorbed into the town fabric. A simple circuit can link the harbour, church, tower, Casa del Nespolo and the Lungomare dei Ciclopi, with pauses to look back at the basalt columns. Across the coast, Aci Castello’s Norman fortress and its civic museum make a natural second stop; Capo Mulini continues the shoreline northward.
A working port and a changing economy
The harbour is still an economic place, not a stage set. The municipality’s 2026 planning report describes Aci Trezza as both a fishing and leisure port and notes an active wholesale fish market, managed by a consortium of local operators. The same report says fishing has contracted over time and now shares the water with recreational boating. Tourism is the Comune’s leading economic activity; restaurants, bars, accommodation and seasonal coastal services are concentrated along the waterfront. That mix is visible in a short visit: the catch and the boats belong to the morning, while the promenade becomes a public meeting place later in the day.
Getting there and checking access
AMTS line 434 runs from Catania Centrale to Piazza delle Scuole in Aci Trezza, passing through Catania and Aci Castello. Check the operator’s current timetable and any temporary diversions before travelling; route numbers and stop arrangements have changed in recent years. The village is compact on foot, but lava shorelines can be uneven and entry to protected sites is controlled.
One restriction deserves special attention: a municipal notice dated 11 September 2026 records a temporary 150-metre exclusion zone in the water off Isola Lachea’s north-west side, where a suspected wartime ordnance was reported. Until the recovery operation is completed, anchoring, fishing, underwater activity, bathing and vessel transit are prohibited in that defined zone. The notice does not describe the whole coast as closed, but visitors planning a boat trip or swim should check the latest municipal and maritime notices. Confirm museum hours and reserve access as well. Aci Trezza is best experienced with this care: the view is spectacular, and the sea is also a protected, working environment.