Grotta dello Smeraldo
The green comes before you expect it. You step off the elevator from the SS 163 highway, board a small wooden rowboat, and then the guide pulls you through the low entrance into a cavern where the water glows — not blue, not teal, but a deep, shifting emerald caused by sunlight filtering up through an underwater fissure in the rock. The roof arches roughly 24 metres overhead. The cave is about 45 metres wide at the water line. Sound carries strangely in here.
On the floor beneath the boats, ceramic figurines from the Vietri kilns make up a nativity scene, placed there in 1956 and still visible through the illuminated water. It is an odd, quietly moving thing to look down at.
💛 What travellers fall for
People who come back tend to time it around 1 p.m., when the sun is high enough to push the most light through the underwater crevice and many tour groups have retreated for lunch. The boat ride runs 15 to 20 minutes — bring a layer, because the interior stays noticeably cooler than the road above.
The story behind Grotta dello Smeraldo
The cave was known in Roman times but fell out of documented record until the early 20th century, when engineer Ruggiero Francese led explorations that drew attention to its geological and ecological significance. The official modern discovery is credited to local fisherman Luigi Buonocore, who found the cave in 1932.
The grotto itself formed along fissures in the cliff during the Pleistocene epoch, shaped by bradyseism — the slow tectonic rising and sinking of the land that defines much of this coastline. In 1956, workers cut an artificial entrance tunnel, installed electric lighting, and built the wooden jetty and walkways that visitors still use today.
Good to know
Reach the grotto by stairs or elevator from the SS 163, or by shuttle boat from Amalfi harbour. Tickets (roughly €7–10) include the boat tour. Hours vary by season and close without notice in rough weather — call ahead or check on arrival. Skip August weekends entirely.
April through May and September through October give you calmer seas, thinner crowds, and enough sun to produce the emerald effect. The light is strongest and most saturated on clear days between roughly 11 a.m. and 2 p.m.; overcast skies or rough water flatten the colour considerably.
Where is Grotta dello Smeraldo?
Location
- In Conca dei Marini
- 40.6189, 14.5697
- Open in Google Maps
Rating
4.2 ★ · 5,257 Google reviews
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What travellers say about Grotta dello Smeraldo
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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