Board the Thalassa for a five-hour cruise around Santorini’s caldera: climb a volcanic crater, soak in sulfurous hot springs, swim near Thirassia, and watch the sun fall behind Oia. This trip mixes geology, local flavors, and a waterfront perspective few land routes can match.
More ways to explore the area's outdoor wonders
Late afternoon light slants across the caldera as the Thalassa slips from Fira’s harbor; the sea tucks itself under the hull and the island’s white buildings climb the rim like stacked paper. The boat noses toward Nea Kameni, and the conversation thins as the volcanic cone fills the horizon—black rock layered by centuries of fire and sea.
Difficulty
easy
Duration
5 hours
Fitness Level
Suitable for most people; requires standing on a moving boat and a short hike over uneven volcanic rock
Wildlife
History
Santorini’s caldera formed in a massive volcanic event around the late Bronze Age (often tied to the Minoan eruption), exposing layered volcanic strata visible from the crater rim.
Conservation
Stay on marked paths at Nea Kameni to protect fragile volcanic soils and avoid chemical sunscreens in hot springs and swimming areas to limit marine pollution.
Reserve your spot on the Daily Sunset Sailing Cruise Tour in Santorini today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Wear sturdy shoes for the crater
The Nea Kameni rim is loose volcanic rock and steps—closed-toe shoes with good tread make the short hike safer and more comfortable.
Bring seasickness remedies
The Aegean can get bouncy at sunset; if you’re prone to motion sickness, take medication or use acupressure bands before boarding.
Use reef-safe sunscreen
Hot springs and clear bathing coves are sensitive—choose biodegradable sunscreen to limit chemical runoff.
Pack a light wind layer
Wind cools quickly after sunset on the water; a lightweight jacket prevents chill during the return to port.
Closed-toe hiking or trail shoes
Protects feet and provides grip for the crater walk and dock transfers.
Reef-safe sunscreen
Prevents skin damage and reduces chemical impact on marine environments.
summer
Light waterproof windbreaker
Blocks wind and light spray during sunset and evening return.
spring
Small dry bag or zip pouch
Keeps phone, camera, and passport dry while swimming or during sea spray.