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De Bosset Bridge and Katavothres

Towns and Culture

De Bosset Bridge and Katavothres

Where the sea disappears underground

The De Bosset Bridge is the most recognisable landmark in Argostoli: a long stone causeway that crosses the Koutavos lagoon, topped halfway along by a small obelisk. It was built in the early nineteenth century under British administration by a Swiss engineer, Charles Philippe de Bosset, to shorten the journey between the town and the northern villages. Walking it takes only a few minutes, but the views of the water, the herons and ducks, and the pastel houses beyond are pleasant, and the lagoon is a quiet place to see the town at a slower rhythm. Early evening, when the light turns gold and the water is still, is the best moment. The bridge is flat, free, and open at all hours, which makes it a natural first stop for any visitor.

From the bridge it is a short drive or a pleasant cycle to the Katavothres, a rocky stretch of coast just north of town where seawater flows into sinkholes and disappears underground. For generations, mills were turned by this flow, and a few have been restored to show the mechanism. The mystery of where the water went was solved in the early 1960s, when a dye test traced it across the island to Melissani Lake and a spring near Sami.

It is one of the most unusual geological stories in Greece, and it makes a satisfying sight even if you are not a science enthusiast.

Nearby, a small rotunda lighthouse stands at the headland of Agios Theodoros, a scenic spot for a sunset walk. It was built in the nineteenth century and later rebuilt after the earthquake. The coastal path here is easy and the gulf stretches out to the west, with the sun dropping behind the hills across the water. Several cafes and tavernas along the shore serve fresh fish and cold drinks.

Plan an hour or two for the whole circuit if you combine the bridge, the sea mills, and the lighthouse. Wear sun protection by day, and bring a light layer for breezy evenings. The sea mills can be crowded in peak season, but the area is large enough that you can find a quiet spot. There is no entry fee for the bridge or the coast, though a restaurant or museum stop will cost extra.

This is also a handy stop for travelers with limited mobility, since the bridge is level and parking is close. Pair it with the Korgialenios museum or a stroll along the main pedestrian street, and it makes a gentle half day that suits any season. Because the sights are free and outdoors, they work well on a day when the weather is uncertain and you want something flexible.

The lagoon itself is worth a few extra minutes. Herons, egrets, and ducks use the shallows, and the water reflects the town in the evening. Anglers often work from the causeway, and the occasional turtle surfaces nearby. On calm days the surface is mirror-like, and the obelisk stands out against the sky. It costs nothing, takes little effort, and gives a real sense of Argostoli as a living town rather than just a transit point.

Come with a camera and an easy afternoon, and let the sights unfold at a gentle pace.

Combine the walk with an ice cream or a coffee in Argostoli afterwards.

What to expect

The experience

A flat, free walk across the causeway, then a short drive or ride to the sea mills and lighthouse.

Best time

Early evening, for golden light and cooler air.

How long

One to two hours for the full circuit.

Tips

Bring sun protection by day and a light layer by night. Swim spots are limited; this is a sightseeing stop.

Quick picks

Best for
Anyone who likes easy, free, story-rich sights.
Families
Great for children and strollers on the bridge; watch the water near the mills.
Couples
A sunset stroll at the lighthouse.
Pair with
The Argostoli bike tour, the turtle quay, and a harbour dinner.
Time needed
One to two hours.

Good questions

Is the bridge free?+

Yes. The causeway is public and open at all hours.

What are the Katavothres?+

Sinkholes on the coast near Argostoli where seawater disappears underground and resurfaces across the island at Melissani Lake and near Sami.

Can I walk from the bridge to the sea mills?+

It is a longer walk than most people expect, so many drive or cycle. Allow time and sun protection if you walk.

When is the best time to go?+

Early evening for golden light and a cooler walk.

Is it accessible?+

The bridge is level and parking is close, which makes it one of the easiest sights on the island.

De Bosset Bridge

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