Grotta dello Smeraldo (nearby coastal cave)
The water inside Grotta dello Smeraldo glows without any artificial light. An underwater fissure lets sunlight enter from below the surface, and the cave — sealed from daylight above the waterline — turns the whole chamber a deep, shifting green. You sit in a flat-bottomed boat with seven other people and watch stalagmites rising ten metres from the cave floor, some of them now submerged, formed back when the grotto sat above sea level.
The cave sits along the SS163 between Praiano and Amalfi, in the municipality of Conca dei Marini. About four metres below the surface, a ceramic nativity scene made in Vietri rests on the cave floor, placed there in 1956 and visited each Christmas Eve and Epiphany by divers who come from across Italy.
💛 What travellers fall for
People who've come back tend to mention the same thing: arrive around 1 p.m. on a clear day. That's when sunlight hits the underwater fissure at the right angle and the green is at its most saturated. The boat from Amalfi harbour adds fifteen minutes on the water each way — worth it for the coastal approach.
The story behind Grotta dello Smeraldo (nearby coastal cave)
The cave formed through bradyseism — slow tectonic movement that fractured the coastal cliffs and gradually submerged what had once been a dry cavern. Until around 6,000 years ago it sat above the waterline; the stalagmites still growing from the floor are evidence of that earlier, drier era. English travellers and local sailors encountered it sporadically through the 19th century, and older texts hint at its existence, but it had no confirmed location until 1932, when a fisherman named Luigi Buonocore found it. Buonocore became so associated with the discovery that he was reportedly recognised in the street for the rest of his life.
Since 1980 the Brangi family has run boat tours inside the cave, guiding what they estimate to be millions of visitors through the chamber.
Good to know
Reach the grotto by SITA bus from Amalfi (roughly 10 minutes) or by boat from the harbour (15 minutes; boat fare and entrance ticket are separate). An elevator runs from the SS163 road down to the cave. Open daily 10 a.m.–4 p.m., weather permitting — rough seas close it without notice. Avoid August if queues concern you.
Spring (April–May) and autumn (September–October) bring calmer seas and smaller crowds — both matter here, since rough weather closes the cave entirely. Summer works, but August in particular means longer waits; a clear, still day at any time of year will give you the strongest emerald light.
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What travellers say about Grotta dello Smeraldo (nearby coastal cave)
I think 10€ for the 20-ish minute boat ride was worth it! The cave was gorgeous. I’m sure there’s better caves for similar prices out there, but for my group’s quick stop in Amalfi Coast, it was worth it to me :)
It was amazing. My firat Grotta so far and i am amazed how wonderful it is. There are two guys rowing boats. Our guy was really fun to listen to.
It's an amazing experience. You get in a tiny row boat that fits 4 people and pilot takes you into a cave (duck you're head!) Inside it is dark. Look down and the water is bright beautiful blue color. Some pilots sing to you while inside the grotto(cave)
Interesting. Not that large inside. Parking is right at the entrance of it and parking fees are included in the ticket price.
Great place. Stopped for a coffee, then we found Grotta dello Smeraldo. €10 for entrance than you will see water shines as Swarovski crystals :)
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