Vouliagmeni
The Athenian Riviera runs south from the city along a limestone shore, and Vouliagmeni's brackish thermal lake sits in a collapsed cave at a constant twenty-four degrees all year. Swim in the lake, then in the sea, and drive on to Cape Sounion for the Temple of Poseidon at sunset — the classic Athenian afternoon since Byron carved his name there.
Why go
A thermal lake in a collapsed cave — twenty-four degrees all year, in the middle of the suburb. Athens's own coast — twenty minutes from the Acropolis by tram or road. Cape Sounion — the Temple of Poseidon on a headland, forty minutes further south. Pine-covered headlands — the Athenian Riviera's most expensive stretch, and its best swimming.
The character
The Athenian Riviera runs south from the city along a limestone coast of small bays and pine headlands, and Vouliagmeni is its centre — a suburb of Athens that functions as a resort, with the wealthy of the capital living on the peninsulas and the rest of the city arriving by bus at weekends. The 2004 Olympics and the tram extension made the coast accessible, and a series of beach clubs and hotels followed.
Lake Vouliagmeni is the oddity. It is a brackish thermal lake in a collapsed limestone cave, connected to the sea by underwater channels, holding water at twenty-two to twenty-nine degrees all year and full of small fish that clean swimmers' feet. Divers have mapped tunnels running hundreds of metres into the rock without finding the end. Beyond the suburb, the coast runs to Cape Sounion, where the Temple of Poseidon has stood on a cliff since 444 BC, and where Byron carved his name into a column in 1810.
Places of character
Lake Vouliagmeni — thermal, mineral, and open all year; go early before the loungers fill. Astir Beach and Kavouri — the organised beach and the free one, ten minutes apart. Cape Sounion — the Temple of Poseidon at sunset, forty minutes down the coast road. Vouliagmeni Marina — the harbour and the fish tavernas around it. Limanakia — rocky coves below the coast road, with no facilities and clear water. Athens — twenty minutes north, which is the point of the whole arrangement.
The way to do it
Swim in the lake in the morning and the sea in the afternoon — the contrast is the local ritual. Take the coast road to Sounion for sunset, which is worth the drive. Use the free rocky coves rather than paying for loungers. And treat this as a base for Athens and not an alternative to it.
One perfect day
Lake Vouliagmeni at eight, floating in twenty-four-degree mineral water under a cliff, with the little fish at your feet. Coffee at the marina. Late morning at Kavouri or the Limanakia coves for the sea itself, which is clear and cold after the lake. Lunch of grilled octopus at a taverna by the water. Afternoon rest, then the coast road south to Sounion, arriving an hour before sunset for the Temple of Poseidon with the Aegean on three sides. Back for dinner on the marina, and the option of Athens twenty minutes away if the evening demands it.
Grand hotels
Four Seasons Astir Palace — the 1958 resort on the peninsula, restored in 2019, and the coast's landmark. Divani Apollon Palace — the older Athenian Riviera address, with its own beach across the road.
When to go
Best expression: May, June and September — warm sea, manageable heat, and Athens accessible. Consider: April and October, when the lake is at its best relative to the air temperature. Avoid if possible: August, when Athens empties onto this coast and the beaches fill by ten.
The frame
Ideal stay 2 nights · Minimum a day from Athens · Best arrival tram or taxi from central Athens, 25 minutes · Airport ATH, 30 km · Walkability within the suburb · Best without a car yes for the lake, no for Sounion