According to Sicilian tradition, the sea stacks off Aci Trezza are the boulders Polyphemus hurled at Odysseus’ ship. The Odyssey does recount the cave, the blinding of the Cyclops and the throwing of rocks, but it does not name Aci Trezza or give modern coordinates. The connection with the Cyclops Riviera is a later geographical and cultural interpretation. Geology tells a different, equally striking story: these rocks bear witness to the earliest submarine volcanism in the Etna area, which began around half a million years ago.
Did Polyphemus really live on Etna? The accurate answer
Polyphemus is a mythological figure, not a historical person. In Book IX of the Odyssey, Odysseus reaches the land of the Cyclopes, enters Polyphemus’ cave with several companions and becomes trapped. He gets the giant drunk, says his name is “Nobody”, blinds him with a stake and escapes beneath the rams’ bellies. As the ship moves away, Odysseus reveals his name and the Cyclops hurls enormous boulders towards the sea.
The poem does not say that the cave is on Etna, nor does it name the sea stacks of Aci Trezza. Yet volcanic caves, black coasts, rumblings and great rocks made an Etna setting credible to authors, travellers and local communities. Today the tradition is part of the coast’s identity, but it should not be presented as archaeological proof.
Myth, text and landscape: what we can say with confidence
| Story | Source or tradition | Link with the landscape |
|---|---|---|
| Odysseus and Polyphemus | Odyssey, Book IX | Tradition places the episode near Aci Trezza; the text gives no such location |
| Boulders thrown at the ship | Odyssey and local tradition | The Cyclops Sea Stacks are symbolically identified with those boulders |
| Hephaestus’ forge | Greek mythology and classical tradition | Etna’s fire and rumblings become the underground work of the smith god |
| Typhon or Enceladus beneath the volcano | Variants in ancient authors | Earthquakes and eruptions are interpreted as movements of the defeated giant |
| Acis, Galatea and Polyphemus | Classical tradition, especially Ovid’s Metamorphoses | Poetically explains the waters and place names of the Aci area |
The Cyclops Sea Stacks: the geological explanation
Lachea Island and the sea stacks are not blocks detached from Etna’s modern summit cone. According to the INGV reconstruction, they belong to the area’s oldest volcanic manifestations: around 500,000 years ago, magma rose in a submarine environment, when both the coastline and the volcanic edifice were very different from today.
At Aci Castello, famous pillow lavas formed when magma cooled rapidly in water. Lachea Island and the sea stacks instead include a subvolcanic body intruded into sediments and later exposed by erosion. Fractures caused during cooling also produced columnar structures. The sea eroded the softer materials and left the resistant basaltic masses exposed.
A distinction that makes the place more interesting
Legend explains why these rocks are called “of the Cyclops”; geology explains how they formed. There is no need to choose between them: they belong to different levels and together tell the story of the relationship between people and the volcano.
Hephaestus and the forge inside Etna
For the Greeks, Hephaestus was the god of fire and metalwork; the Romans identified him with Vulcan. One tradition placed his workshop beneath Etna, where the god and the smith Cyclopes forged weapons and extraordinary objects. Rumblings, night-time glows and sparks thus became hammers, furnaces and molten metal.
These artisan Cyclopes do not always coincide with the pastoral Cyclopes described by Homer. Mythology is not a single, coherent system: authors and eras combine different genealogies and functions. A good account of Etna should say which tradition it follows rather than merging every giant into a single biography.
Typhon and Enceladus: the giant beneath the mountain
Other stories imagine a defeated giant buried beneath Sicily or Etna. Depending on the source, it is Typhon, Zeus’ great adversary, or Enceladus, one of the Giants. In these stories, the giant’s breath fuels the fire and its movements produce earthquakes and eruptions.
The versions change because myths travelled and were rewritten. They are not accounts of specific eruptions, but show how the ancient world gave a body and a will to invisible processes underground. Today, seismometers, GPS, gas analysis and thermal images explain the physical processes without erasing the literary value of those images.
Acis, Galatea and the jealousy of Polyphemus
The story of Acis and Galatea is distinct from the encounter between Odysseus and Polyphemus. In the version made famous by Ovid, Galatea loves the young Acis; Polyphemus, rejected and jealous, kills him by crushing him with a rock. Acis’ blood is transformed into water, linking the story to springs, rivers and numerous coastal place names: Acireale, Aci Castello, Aci Trezza and other towns in the Aci area.
When a guide tells both episodes, they must not be blended: in the Odyssey, Polyphemus confronts Odysseus; in the Metamorphoses, he is Acis’ rival in love. The same character and landscape produce two narratives with different themes and sources.
Why Etna has generated so many myths
- The glow of eruptions recalled a furnace visible from far away.
- Rumblings and earthquakes seemed like the work of enormous beings underground.
- Caves and lava tubes offered imagined entrances to workshops, prisons and the underworld.
- Lava flows destroyed landscapes while also creating new ground, promontories and forms.
- The mountain dominated sea routes, farmland and towns, entering the daily life of many peoples.
Myth does not arise from ignorance in any simple sense. It is a tool for ordering fear, wonder and collective memory. Even today, names such as “the Mountain” and “Mongibello” show that Etna is more than a geological object: it is a cultural presence with which the region continues to engage.
Where to encounter these stories on an excursion
There is no recognised “Polyphemus crater” on Etna that proves Homer’s story. There are, however, landscapes that help explain its power: side cones, black lava fields, lava tubes and views towards the coast. A guide can show how a cavity actually forms, then explain why caves and rumblings were once connected with giants and gods.
Half-day Etna trekking
A first visit to Etna North, among the Sartorius Craters and a cave.
€60
Etna North summit craters
A high-altitude excursion subject to the day’s conditions and access restrictions.
€120
Etna at sunset
Volcanic landscapes and late-afternoon light.
€80
- Half-day Etna trekking: from €60, around 3 km and 100 m of elevation gain. It includes the 2002 lava landscape, the Sartorius Craters and a lava tube: it is the route best suited to a story that connects geology and myth.
- Etna North summit craters: €120, an activity of around five hours with 4×4 transport and high-altitude trekking. The active volcano takes centre stage, but the itinerary remains subject to conditions and restrictions.
- Etna at sunset: from €80, around 4 km and 250 m of elevation gain. Evening light helps reveal forms and colours without pretending that you will witness an eruption or Hephaestus’ forge.
Etna and Aci Trezza in the same trip
To connect story and landscape, set aside half a day for Etna North and half a day for the Cyclops Riviera rather than trying to fit in a long trek. In Aci Trezza, walk along the seafront, observe Lachea Island and the sea stacks from the harbour, and if you choose an activity on the water, use authorised services in the marine protected area.
Transfer time depends on your base and traffic: Aci Trezza is on the coast north of Catania, while Dream Island tours depart at the points and times stated in their pages. Free pick-up for group tours is provided within 30 km of Linguaglossa and only at the listed points; do not assume collection from Aci Trezza.
How to visit the Cyclops Riviera with respect
- Observe the sea stacks without climbing them or landing in unauthorised areas.
- Check the rules and available visits for the marine protected area and the Strict Nature Reserve.
- Do not collect rocks, organisms or artefacts from the coast or seabed.
- Distinguish geological information from phrases such as “according to legend”.
- Use the local name Aci Trezza; the combined spelling Acitrezza also appears online.
Frequently asked questions about Etna myths
Does Homer say that Polyphemus lived in Aci Trezza?
No. Book IX of the Odyssey recounts the land of the Cyclopes but does not name Aci Trezza. The identification with the Etna coast belongs to later tradition.
Are the sea stacks rocks thrown from Etna?
Not in geological terms. They are very ancient volcanic outcrops linked to the earliest submarine phases of the Etna area; Polyphemus’ boulders are the mythical explanation.
Are Hephaestus and Polyphemus the same character?
No. Hephaestus is the smith god; Polyphemus is the Cyclops encountered by Odysseus. Some traditions also describe smith Cyclopes who help Hephaestus, but these are distinct figures and narrative cycles.
Are Acis and Galatea part of the Odyssey?
No. Their story is a different myth, known above all through Ovid, in which Polyphemus appears again.
Can I visit a lava tube and the Cyclops Sea Stacks on the same day?
Yes, with a short tour and cautious logistics, but check departure times, traffic and reserve rules. Do not combine a long trek with a tightly timed coastal visit.
Texts, geology and local sources
To clearly distinguish story from scientific evidence, consult: