What to See at Delos
The Terrace of the Lions, the Sanctuary of Apollo, the mosaic houses, the theatre, Mount Kynthos and the island museum — a concierge guide to the sacred island.
The Archaeological Site of Delos gathers the sacred and cosmopolitan heart of one of the great islands of antiquity into a compact, walkable site ringed by the Aegean. The must-see monuments are the Terrace of the Lions, the island's emblem; the Sanctuary of Apollo at its core; the quarter of merchant houses with their brilliant mosaics — the House of Cleopatra, the House of Dionysus and the House of the Masks; the ancient theatre with its great cistern; and the sacred summit of Mount Kynthos. The Archaeological Museum of Delos on the island, included in your ticket, holds the original lions and the finest finds. This guide walks you through the key monuments, the museum, and what to prioritise on a half-day visit.
What are the must-see monuments at Delos?
The must-see monuments at Delos centre on the Sanctuary of Apollo and the Terrace of the Lions. The sanctuary, spreading inland from the ancient harbour, was the sacred heart of the island — a precinct of temples, altars and treasuries where Greeks from across the Aegean came to worship Apollo, and its foundations let you read the plan of one of antiquity's greatest religious centres. A short walk away stands the island's emblem, the Terrace of the Lions, a row of archaic marble lions that guarded the sacred way beside the sacred lake. Beyond them climbs a quarter of wealthy merchant houses, several named for the superb mosaics still on their floors, while the ancient theatre and the peak of Mount Kynthos rise above. Walking among these is the essential experience of Delos, best done on a cool early boat before the cruise groups arrive.
Beyond the headline monuments, much of Delos rewards a slower look. The maze of ancient streets is lined with houses, shops, cisterns and sanctuaries to foreign gods brought by the island's immigrant traders, conjuring its life as a cosmopolitan port as vividly as the sanctuary conjures its holiness. Interpretive signs help you trace the plan, and the Archaeological Museum near the landing, included in your ticket, gathers the sculpture, mosaics and everyday finds that give the ruins detail — including the original Terrace lions. On every side the Aegean shines, and the neighbouring islands ring the horizon. Our concierge recommendation is to walk the sanctuary and the Terrace first, wander the mosaic houses, then finish in the museum, adding the theatre and Mount Kynthos if you have taken an early boat and have time before your return sailing.
What is the Terrace of the Lions?
The Terrace of the Lions is the supreme image of Delos and its enduring emblem. A row of archaic marble lions, carved from Naxian marble in the 7th century BC and dedicated by the people of Naxos, they crouch on their haunches with open mouths, gazing eastward across the ruins toward the sacred lake they were set to guard. Lean, stylised and powerful, they show the bold, formal character of archaic Greek sculpture, and as an avenue of monumental stone beasts they are unlike anything else surviving from the ancient world. Their silhouettes against the sea and sky have become the symbol of the sacred island.
The lions you see on the terrace today are faithful replicas, set in the original positions to face the elements as the ancients intended, while the surviving originals — worn but magnificent — are sheltered indoors in the island's Archaeological Museum, included in your ticket. Of the original group, thought to have numbered around a dozen, only a handful survive on Delos; one was carried off long ago and now stands at the arsenal in Venice. Beside the terrace lies the dry bed of the sacred lake, where myth placed the birth of Apollo beneath a palm tree. Our concierge recommendation is to see the replicas on the terrace in the open light, ideally early when the marble glows, then find the battered originals in the museum to appreciate the ancient carving up close.
What is the Sanctuary of Apollo?
The Sanctuary of Apollo is the sacred core of Delos, the precinct that made the island one of the holiest places in the Greek world. Spreading inland from the ancient harbour, it was a dense complex of temples, altars, treasuries and monuments raised over centuries by worshippers and cities from across the Aegean. Several temples of Apollo stood side by side, along with the great horned altar and long lines of dedications, statues and stoas that framed the processional ways. Pilgrims arriving by sea came ashore and moved up through this sanctuary toward the god's temples, and the festivals held in Apollo's honour, with their contests and choruses, drew crowds from all the surrounding islands.
Walking the sanctuary today, you trace the foundations and lower courses of these buildings in the clear Cycladic light, reading the plan of a pan-Hellenic religious centre. Close by stood the Sanctuary of Artemis, Apollo's twin, and monuments dedicated by Hellenistic kings and cities eager to display their piety and power. Because the whole island was sacred to Apollo, the boundary between temple and town is subtle, and the sanctuary flows into the streets and houses around it. Our concierge recommendation is to begin here after landing, while the ground is still cool and the site quiet, letting the audio history set the scene so the scattered stones resolve into the beating heart of the sacred island.
What are the merchant houses and their mosaics?
Beyond the sanctuary spreads the residential and commercial quarter of Delos, the part of the ruins that most vividly conjures its life as a cosmopolitan trading port. In the Hellenistic and Roman periods the island was home to a wealthy, international population of merchants who built fine houses along a maze of narrow paved streets climbing from the harbour. Many were grand, with rooms arranged around colonnaded courtyards and cisterns to catch the scarce rainwater, and several are named for the superb mosaics still preserved on their floors: the House of Cleopatra, with statues of its owners; the House of Dionysus, whose floor shows the god riding a panther; and the House of the Masks, famous for its mosaic of Dionysus and its panels of theatrical masks.
These mosaics are among the finest to survive from antiquity, and seeing them in the very rooms they decorated — rather than lifted into a museum — is one of the special pleasures of Delos. Walking the ancient lanes, past doorways, shop fronts and the shrines of foreign gods brought by immigrant communities, you gain an unusually intimate sense of daily life in a Mediterranean trading city two thousand years ago. Please keep to the paths, as the mosaics are fragile and protected. Our concierge recommendation is to allow time to wander this quarter slowly, letting the streets, courtyards and floors reveal the island's second life as a bustling international port, not only a holy sanctuary — a contrast that makes Delos so unusually complete.
What are the theatre, Mount Kynthos and the museum?
Rising above the merchant houses stands the ancient theatre of Delos, built into the slope in the Hellenistic period to seat several thousand spectators. Its weathered stone tiers still sweep in a great curve toward the sea, and beside it survives a huge vaulted cistern that collected rainwater from the seating to supply the district — a reminder of how precious water was on this dry island. Above the theatre the ground climbs to Mount Kynthos, the rocky peak that dominates Delos and was itself sacred; a stepped ancient path leads up past shrines, including cults of Egyptian and Syrian gods, to the summit, where an altar to Zeus and Athena once stood and the view opens over the whole sacred island ringed by the Aegean and the circle of the Cyclades.
The natural finish to a visit is the Archaeological Museum of Delos, on the island near the landing and included in your ticket, which also offers the island's one substantial patch of shade. Built to hold the finds of the long French excavations, its galleries gather sculpture, mosaics, pottery, inscriptions and everyday objects that bring the sanctuary and the port to life. Among its treasures are the original archaic lions from the Terrace, fine Hellenistic and Roman statues from the merchant houses, and objects that speak of the island's far-flung trade and its many foreign cults. Our concierge recommendation is to attempt Mount Kynthos only with an early boat, water and sun protection, and to save the museum for the end, where the finest sculptures and the original lions give faces and detail to the island you have just walked.
Frequently asked
What are the main monuments at Delos?
The Terrace of the Lions, the island's emblem; the Sanctuary of Apollo at its heart; the merchant houses with mosaics such as the House of Cleopatra, the House of Dionysus and the House of the Masks; the ancient theatre with its great cistern; and the sacred peak of Mount Kynthos. The on-island museum, included in the ticket, holds the finds.
What is the Terrace of the Lions at Delos?
A row of archaic marble lions carved from Naxian marble in the 7th century BC, dedicated by the people of Naxos to guard the sacred way beside the sacred lake. Replicas stand on the terrace today; the surviving originals are in the island museum. They are the emblem of Delos.
What is the Sanctuary of Apollo?
The sacred core of Delos — a precinct of temples, altars and treasuries where Greeks from across the Aegean came to worship Apollo, the god held in myth to have been born on the island. Its foundations let you read the plan of one of antiquity's greatest religious centres.
Can I see the famous Delos mosaics?
Yes. The quarter of merchant houses preserves brilliant mosaics on their floors, in the very rooms they decorated — including the House of Cleopatra, the House of Dionysus with its god riding a panther, and the House of the Masks. Keep to the paths, as the mosaics are fragile and protected.
Is the island museum included in my ticket?
Yes. The Archaeological Museum of Delos is on the island, near the landing, and included in your entry ticket. It shelters the original Terrace lions and displays fine sculpture, mosaics and finds — and offers the island's one substantial patch of shade.
Is it worth climbing Mount Kynthos?
If you have taken an early boat and have water and sun protection, yes. The stepped path up the sacred peak passes ancient shrines and rewards you with a panorama over the whole island and the ring of the Cyclades. The climb is short but steep and fully exposed.
How long do I need to see Delos?
Allow about two to three hours — the window the boat schedule usually gives — to walk the Sanctuary of Apollo, the Terrace of the Lions and the mosaic houses and tour the museum, adding the theatre and Mount Kynthos with an early boat. The lack of shade favours a focused morning visit.