Circle the Bay's glamour island by boat -- past the towering Faraglioni rock stacks, with swim stops in impossibly blue water -- then slip into the Blue Grotto, a sea cave where light refracts through an underwater opening to glow electric blue. It's a genuine once-in-a-lifetime sight, plus free time in Capri town. Honest caveat: the Grotto is the most weather-dependent thing on this list and can close on rough seas; tours run from Sorrento (hydrofoil from Naples), so this is a fuller-day commitment with a tighter return.
What to expect
You'll board a small boat from Sorrento (accessible by hydrofoil from Naples) and cruise the Bay of Naples past the dramatic Faraglioni rock stacks rising from impossibly blue water, with planned swim stops to snorkel in those electric-colored seas. The journey culminates in a slip into the Blue Grotto, a sea cave where refracted light transforms the water into an otherworldly glow—a sight rarely forgotten. After the grotto, you'll have free time to explore the charming piazzas and boutiques of Capri town before returning. The rhythm is unhurried but full: roughly 7–8 hours door-to-door, with the boat's English-speaking skipper setting the pace and prosecco or soft drinks on hand.
Good to know
Depart early enough to catch the hydrofoil from Naples to Sorrento (book this leg yourself or confirm timing with MBS directly), as the excursion is a full-day commitment with a tight return window to your ship. Budget EUR 18 for Blue Grotto entry and EUR 15 for an assistance fee—both paid on-site upon arrival, not upfront. Book directly through mbsblucharter.com rather than third-party portals: you'll save roughly EUR 50 per person compared to capri.com or cruise-line intermediaries. Essential caveat: the Blue Grotto closes on rough seas, so confirm weather and grotto access 24 hours before departure; bring a light layer, reef-safe sunscreen, and a waterproof phone pouch for snorkel stops.
Sail there
Luxury cruises that call at Naples — book through us, the fare is identical and your concierge stays on your side.