Spend a day cruising from Nidri to the quieter Ionian isles of Kastos and Kalamos, with swims, a dramatic visit to the Papanikolis Cave, and village strolls. This 8-hour trip mixes short hikes ashore, snorkeling, and long beach stops for a relaxed island rhythm.
More ways to explore the area's outdoor wonders
The bow cuts through olive-dark water as pine-scented cliffs of Kalamos and the low islet of Kastos slide into view. Salted wind pushes the day forward; swimmers slip over the rail into turquoise shallows where the sea seems to dare you to linger. By mid-morning the boat noses into the mouth of the Papanikolis Cave — a hulking karst cavern once large enough to hide a submarine — and the light inside reduces the world to bands of blue and shadow.
Difficulty
easy
Duration
8 hours
Fitness Level
Minimal exertion required; participants should be able to step on/off the boat and swim short distances from the tender.
Wildlife
History
The Papanikolis Cave earned its name from the WWII submarine Papanikolis, which used large sea caves around Meganisi as wartime hideouts.
Conservation
The area hosts sensitive posidonia seagrass beds and marine life—avoid anchoring on seagrass, use reef-safe sunscreen, and follow local wildlife distance guidelines.
Reserve your spot on the Forgotten Islands - Kalamos & Kastos today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring reef-safe sunscreen
Protect marine life and your skin—apply broad-spectrum, reef-safe SPF before boarding and reapply after swims.
Wear water shoes
Beaches here are often rocky; water shoes make swims and shore landings easier and protect from sea urchins.
Carry cash for villages
Small tavernas and shops on Kastos and Kalamos may not accept cards—bring euros for drinks, snacks, and souvenirs.
Plan for sea conditions
If you get seasick, take preventative medication before departure and choose a seat near the center of the boat for a smoother ride.
Swimsuit & quick-dry towel
Essential for the multiple swim stops and sun exposure.
summer
Reef/water shoes
Protect feet on rocky beaches and when boarding from the water.
summer
Light windbreaker or layer
Useful for cooler mornings and breezy returns across the channel.
spring
Passport/ID and small cash (EUR)
Authorities may request passenger details and island shops often prefer cash.