Santorini

Santorini is the most iconic Greek island — population 15,000 in summer (locals 4,000), an active volcanic caldera in the Aegean Sea formed by the catastrophic 1600 BC Minoan eruption that may have inspired Plato's Atlantis myth. The island is technically a sunken volcano whose rim forms a 10km-wide caldera with the still-active Nea Kameni volcano in the center (last erupted 1950). Oia (north tip, pronounced "EE-ya") + Fira (capital) cling to 300m cliffs above the caldera — the white-walled, blue-domed church image is canonical. Most-photographed sunset on Earth happens in Oia: visitors arrive 1.5h before sunset to claim a spot at Oia Castle ruins. Beyond cliff villages: Akrotiri (Bronze Age "Pompeii" preserved under volcanic ash from the 1600 BC eruption — frescoes still vibrant), Red Beach + Black Beach (volcanic sand colors), and 2 wineries with grape varieties unique to volcanic soil (Assyrtiko white, Vinsanto dessert wine). 5-hour ferry from Athens or 50-minute flight.

Iconic Greek + Santorinian cuisine: Tomatokeftedes (cherry tomato fritters, $8-12 — Santorini's famous cherry tomato variety grows on volcanic soil), Fava (yellow split pea purée, $8-15), Moussaka (eggplant casserole, $15-25), Octopus on the line (sun-dried + grilled, $20-35 — Ammoudi Bay restaurants in Oia), Saganaki (fried Greek cheese, $10-15), Assyrtiko white wine ($30-60/bottle — Domaine Sigalas, Boutari), Vinsanto dessert wine ($40-80), Ouzo aperitif ($8-15).

Bottom line: Santorini is honeymoon pick + Oia sunset bucket-list + most expensive Greek island. 3-4 days minimum (allow weather buffer + slow Greek pace).