Emerald Grotto and Amalfi Coast Cruise

Capri has the Blue Grotto, but the Amalfi Coast has its own glowing cave: the Emerald Grotto at Conca dei Marini. Discovered in the 1930s by a local fisherman, it is a sea cave whose water turns a deep green when sunlight enters from beneath, and it is unusual for the stalactites and stalagmites that rise from the water and a submerged nativity scene placed on the seabed. A small-group cruise reaches it by boat, following the coast from Positano or Praiano past cliffs, coves and watchtowers. At the grotto you transfer to a small rowing boat for a short, calm tour of the cave, then return to the main boat for the rest of the route. The cruise also passes the headlands and villages of the coast, often with a swim stop, so you see the Amalfi scenery from the water as well as the grotto.

The linked booking is a small-group cruise with a stop at the Emerald Grotto, a lower-key alternative to the Blue Grotto day from Sorrento. The cave is calmer and less crowded than its Capri cousin, entry is easier because the boat transfers are short, and the green light is reliable in good weather. It is also a more flexible choice when the sea around Capri is rough, since the Amalfi side is often more sheltered, though high swell still closes the cave.

Know what to expect. The cave visit lasts only a short time, a quarter of an hour at most, so most of the cruise is spent on the coast itself. The grotto entrance fee may be paid separately on the day, so read the inclusions carefully. Light is best around midday on bright days, and photographs from a rocking boat are harder than they look. A swim stop in a nearby cove often follows, so bring swimwear, a towel and sunscreen. If you are sensitive to motion, take tablets before departure.

The cruise works well for travellers based in Sorrento or Positano who want a sea experience without a long day. It is shorter than a Capri trip, it combines a landmark with a coastal view and it fits families with older children, who enjoy the rowing boat and the swim. Because it runs from spring to autumn and depends on calm seas, plan for flexibility and choose a refundable booking.

Pair it with a day on land in Amalfi or Ravello and you will have seen the coast from both angles. In low season, operators run fewer departures and may replace the boat leg with road transport, so confirm the programme before you rely on it.

A few ideas will improve the day. Choose a morning departure if possible, as the sea is calmer and the grotto less busy. Wear swimwear under your clothes and bring a dry change, because the rowing boat can splash. Cameras with good low-light performance cope better inside the cave, and a waterproof case is worth having. If you have mobility concerns, ask the operator about the transfer to the rowing boat, which involves a step down and a seat low in the hull.

Remember also that the land above the grotto is reached by a long staircase from the road, which some travellers use instead of a boat; if you are staying on the coast, compare the two approaches and see which suits your schedule.