The Cave of Antiparos has been known since antiquity. It is among the deepest and most historically significant caves in Greece, and one of the oldest continuously known cave sites in Europe. For most visitors to the island, it is the single thing they would say you cannot skip — and for once, the common advice is right.
What the cave is
The cave sits in the interior of the island, about 12 kilometres south of the Chora on the road towards Agios Georgios. At its entrance, the ground opens into a descent of 411 steps, cut into the rock, leading 98 metres below sea level to the main chamber. The cave extends further beyond what is open to visitors, but the accessible section alone is substantial — the main chamber is roughly 100 metres across, with a high ceiling from which stalactites hang at every scale, from thin needle formations to columns as wide as a person, some of which have been growing for 20,000 years.
The temperature inside is a consistent 17°C regardless of the season — cool in summer, mild in winter. Bring a light layer if you run cold.
The history
The cave was known in ancient times and mentioned by classical authors, though its significance as a tourist destination — if that word can be applied to antiquity — began in the early modern period. In the 14th century, it was described by Cristoforo Buondelmonti, a Florentine monk who travelled the Aegean and wrote extensively about what he found.
The cave became a formal tourist destination in the 18th and 19th centuries, visited by European aristocrats and travellers on the Grand Tour of the Levant. Lord Byron is said to have carved his name on one of the stalactites during a visit in 1810. Whether he actually did this is disputed — the relevant stalactite is real, the carving is real, but its attribution to Byron may be apocryphal. The story persists regardless.
Most strikingly, in January 1840, King Otto of Greece — then newly installed on the Greek throne — held a Christmas mass inside the main chamber of the cave, attended by 400 people. A Greek Christmas mass underground, in a cave on a small Cycladic island, attended by a Bavarian king. Greece has always been able to produce this kind of story.
Visiting practically
Getting there: The cave is about 12 kilometres from Antiparos Chora. You can drive — the road is paved all the way. A scooter or small car is the easiest option. There is a local bus from the Chora in summer, running twice daily; check current schedules at the port or your accommodation. Taxis are available but limited — book in advance if you plan to rely on them.
Hours and entry: The cave is typically open daily from approximately 10:00 to 17:30 in summer (June through September), with reduced hours in May and October. Entry is charged — currently around €6 for adults. The cave is guided, with groups descending at intervals of roughly 20 minutes.
What the visit involves: The descent on stone steps takes about 15 minutes at a comfortable pace. The main chamber visit lasts 20 to 30 minutes. The ascent takes the same time as the descent. The total visit is roughly an hour. The steps are well-maintained but uneven in places, and the path is occasionally narrow. Sensible shoes are essential.
When to go
The cave is busiest between 11:00 and 14:00, when organised tours from Paros and Antiparos converge. The best time to visit is at the end of the day — if you arrive around 16:00 or 16:30, you will often find smaller groups and occasionally have the main chamber to yourself in the final descent. The combination of the cave's cool interior and the golden light outside as you emerge is one of those accidental perfections that Greek islands produce.
Visiting in September or early October, when the tourist season has thinned, gives the cave a different quality — quieter, more clearly ancient, less transited.
A note on the experience
The cave is not comfortable in the way that most tourist experiences try to be. The steps are long. The chambers are genuinely underground and genuinely dark beyond the installed lighting. There is nothing manufactured about it — no sound effects, no theatrical lighting changes, no narrative overlay. You are simply underground, looking at formations that have been growing since the Pleistocene, in a space that has been known to human beings for at least two thousand years.
That is, straightforwardly, quite something.
Guests at The Fortress who want to visit the cave at dusk — the recommended time — can reach it by the estate's car in about 20 minutes. The concierge arranges the timing to arrive after the main afternoon groups have left.