Ancient Thera is the Greco-Roman city that crowns the ridge of Mesa Vouno, directly above Perissa — a spectacular archaeological site strung along a high spine of rock, with the black-sand beach on one side and Kamari on the other. It's the standout historical sight of this side of Santorini. Here's a complete guide to visiting. For the wider island, see our best day trips guide.
What Ancient Thera is
Founded by Dorian settlers from Sparta — traditionally in the 9th century BCE, under a leader named Theras, who gave both the city and the whole island their name — and built up through the Hellenistic and Roman periods — most spectacularly when the Ptolemies of Egypt turned it into their naval base for the whole Aegean in the 3rd century BCE, rebuilding much of it on a grid for the fleet's officers and bringing the cults of Egyptian gods like Isis and Serapis — the city occupied the naturally defensible spine of Mesa Vouno for over a thousand years. Excavations have revealed houses, an agora, temples, cisterns and rock-cut inscriptions strung along the ridge — and among those inscriptions is some of the earliest alphabetic Greek writing to survive: 7th- and 6th-century-BCE names, prayers and boasts carved into the rock around the sanctuary of Apollo Karneios and the Terrace of the Festivals, where youths once danced naked to the god. It's the remains of a real ancient town, not a single monument. It sits high above the modern black-sand village, and the setting is half the experience.
What to see
- The long processional street running along the ridge, lined with building foundations.
- House and temple foundations, the agora, cisterns and rock carvings.
- The Terrace of the Festivals — the site's great viewpoint, where boys danced for Apollo and archaic dancers left some of Greece's oldest carved inscriptions in the rock.
- The huge views — straight down to Perissa on one side and Kamari on the other, with the Aegean beyond.
Give yourself time to walk the full spine of the site; the ruins spread out along the rock rather than clustering in one spot.
How to get there
Ancient Thera sits on the ridge of Mesa Vouno, about 370 m above the sea and high above the village, and there are two ways up:
- By road (via Kamari) — the site is about 3.5 km from Kamari by a narrow switchback road up to the Sellada saddle, where there's parking near the entrance; it's the easiest option. In season a shuttle bus and taxis run up from Kamari (the shuttle is roughly €10). There's no drivable road up from the Perissa side, so drivers and taxis reach the site via Kamari.
- On foot — a demanding path climbs up from Perissa or Kamari. Walkers can go straight up from the black sand via the Mesa Vouno ridge hike to the Sellada saddle and the ruins. The Perissa side is steep and rocky but short, gaining around 350 m in roughly 45 minutes to an hour; it's exposed with little shade.
Either way, wear sturdy shoes and bring water and sun protection — there's little shade on the ridge.
When to go & practical notes
- Go early in the morning for cooler air and clear light along the ridge — it gets hot and exposed by midday, especially in high summer.
- Opening hours are seasonal (usually daily except Wednesday, roughly 08:30–15:30, with last admission around 15:00), so check current times before visiting rather than relying on a fixed schedule.
- Entry is around €10 (raised from €6 in the late-2025 fee revision), with a reduced ~€5 rate (EU over-65s and non-EU under-25s) and free entry for under-18s and EU citizens under 25. A ~€15 three-day multi-site ticket also covers Akrotiri, the Museum of Prehistoric Thera in Fira and more — worth it if you're doing more of the island's archaeology. Greek state-site fees change periodically, so confirm the current rate at the gate.
- Combine it with the Mesa Vouno hike for a half-day of history and views. See our things to do and practical info to plan around it.
Frequently Asked Questions
What is Ancient Thera?
Ancient Thera is a Greco-Roman city on the Mesa Vouno ridge above Perissa, founded by Dorian settlers and built up through the Hellenistic and Roman periods. Its ruins include houses, an agora, temples and cisterns strung along the rock.
How do you get to Ancient Thera from Perissa?
By a steep road up from the Sellada saddle above Kamari (drive, taxi, or the seasonal Kamari shuttle — there's no drivable road up from the Perissa side, so vehicles route via Kamari, about 3.5 km away), or on foot by a demanding path up from Perissa or Kamari. The site sits about 370 m above the sea; the Perissa footpath is steep but short, gaining around 350 m in roughly 45 minutes to an hour. Wear sturdy shoes and bring water and sun protection.
What are the opening hours of Ancient Thera?
In the main season the site is open daily except Wednesdays, roughly 08:30–15:30 — note it closes on Wednesdays, not the Tuesday that many Greek sites take, which catches people out. In winter the site runs reduced hours: in November it opens weekends only (Friday–Sunday, 08:30–15:30), and from December to February it's by appointment only (through the Ephorate of Antiquities of the Cyclades). Always check current times before visiting. Early morning is best for cooler air and clear light.
