Diagram by Greece Trips. Free to reuse with credit - CC BY 4.0.
With Pythagoreion it is inscribed together on the UNESCO World Heritage List as Pythagoreion and Heraion of Samos - one listing covering two sites.
Set your expectations before you drive out
This is the honest part, and it is our own guide’s own assessment:
One column still stands. Everything else on the site reads as foundation courses at ankle height, which is why the plan on the information board does more work here than the ruins do.
That is not a reason to skip it. It is a reason to arrive knowing what a great sanctuary looks like after two and a half thousand years, and to give the information board the attention it deserves - the scale is in the plan, not in the standing stone.
Why it matters anyway
Samos carries an ancient record that punches well above the island’s fame. The Heraion and Pythagoreion together are why a history traveller gives Samos a day or two over a purely beach island.
A sanctuary of this importance on an island most people have not considered is a genuinely unusual combination, and it is the reason the UNESCO listing exists.
The other half of the listing
Pythagoreion is the ancient fortified port that lies under and around the modern town of the same name - and it holds the Tunnel of Eupalinos, a 6th-century BC feat of engineering that is the single most remarkable thing on the island.
The two sit close enough to do together, and the listing treats them as one thing.
Practical notes
Getting to Samos: Samos Airport “Aristarchos of Samos” (SMI), near Pythagorio, flown by Olympic Air and Sky Express plus a summer roster of European airlines.
By sea: Blue Star Ferries from Piraeus into Karlovasi (from about 7 hr 35) and Vathy (from about 8 hr 30), three to seven days a week - an overnight or whole-day leg, not a transfer.
When: May to June and September to October for warm days, a swimmable sea and comfortable hiking. July and August are hottest, busiest and windiest on the north coast.
We print no site hours or ticket price.
Common questions
Is there much to see? One standing column and foundation courses. The plan on the board does the work. Go for the significance and the setting rather than for standing architecture.
Is it the same ticket as Pythagoreion? They are one UNESCO listing; we make no claim about ticketing, which is the kind of arrangement that changes.
How much time does it need? Less than its importance suggests, which is why most people pair it with Pythagoreion.
Next
Our Samos guide has the practicalities, Pythagorio covers the other half of the listing, and things to do in Samos covers the island.