Spend a full day on Santorini’s caldera: a guided volcano hike, a swim to sulfurous hot springs, a village stop on Thirassia and a bus-topped sunset in Oia. Practical tips, geology and route info to plan your day.
More ways to explore the area's outdoor wonders
You step off the ferry at Athinios and the caldera opens like a raw page of earth—sheer cliffs, white houses clinging to basalt, and the sea pushing light into every crevice.
Difficulty
moderate
Duration
9 hours
Fitness Level
Moderate fitness recommended—comfortable with sustained walking on uneven volcanic terrain and short open-water swims.
Wildlife
History
Santorini’s caldera is the result of repeated volcanic eruptions, including a massive Bronze Age event (Thera) that reshaped regional history and left layered pumice and lava formations.
Conservation
The caldera and islets are ecologically sensitive—avoid applying oily sunscreens before entering springs, pack out trash, and stick to marked paths to reduce erosion.
Reserve your spot on the Full Day Boat Tour to Caldera Islands & Sunset in Oia by bus today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Volcano entrance fee
Carry €5 in cash for the volcano admission; card payment isn’t guaranteed at the site.
Swim only if confident
The boat anchors 30–50m from the springs—only attempt the swim if you’re a strong swimmer; flotation noodles are provided.
Wear sturdy shoes
Trails are uneven volcanic rock—closed-toe hiking shoes with grip reduce slip risk and protect your feet.
Sun and wind protection
Bring a hat, sunscreen and a light windproof layer—the exposed caldera and deck get intense sun and sudden wind gusts.
Sturdy hiking shoes
Protects feet on sharp volcanic scree and provides traction on uneven trails.
Swimwear + quick-dry towel
Needed for the 30–50m swim to Palea Kameni’s hot springs and quick drying afterward.
summer
Sun protection (hat + SPF 30+)
Crucial on deck and exposed volcanic slopes where shade is limited.
summer
Light daypack with water bottle
Carries water, cash for the entrance fee, extra layer and personal items during the full-day tour.