Cascais

Boca do Inferno - Devil’s Mouth

Cascais

Rating★4.6(48,584 reviews)

AddressAv. Rei Humberto II de Italia 642, 2750-800 Cascais, Portugal

AttractionTop Rated

These scenic oceanfront cliffs feature a natural archway & open cave created by pounding waves.

Last updated: February 11, 2026

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Overview

These scenic oceanfront cliffs feature a natural archway & open cave created by pounding waves.

Opening Hours

Monday

Open 24 hours–

Tuesday

Open 24 hours–

Wednesday

Open 24 hours–

Thursday

Open 24 hours–

Friday

Open 24 hours–

Saturday

Open 24 hours–

Sunday

Open 24 hours–

Visitor Reviews

**★★★★★ Malin — a week ago

Beautiful spot! Maybe not like Nazare, but if you dont wish to go that far this is also a powerful spot of natures wonders and power! No tickets. Just whatch the large waves hit land!

**★★★★★ Adriana Delgado — a month ago

This was one of my favorite stops during my trip to Portugal. Unfortunately I went on a day that the waves were not too strong but it was still pretty impressive sight to see. It was so mesmerizing and peaceful even with the fury of the ocean coming down on the rocks.

If you visit please be careful, there are a lot of areas where potential deadly accidents can happen. Be mindful of where you step and how far out in the rocks you go.

Definitely worth a trip to Boca Du Inferno.

**★★★★★ Paul Osswald — 3 months ago

Boca do Inferno is definitely worth a visit. Even though the sea was quite calm during our visit, the rock formations were still stunning and really show the power of nature. It’s just a short walk from Cascais, so it can be a bit touristy, but the views make it worthwhile.

The coastline in this whole area is incredibly beautiful and impressive — a great spot for photos and a nice stop while exploring Cascais.

**★★★★★ Tina Wong — 3 months ago

It’s stunning, busy as it’s a typical tourist attraction, but I think we were there close to the end of the season. I sat with some local fishermen on the rocks and listened to their banter. It was just a refreshing change from the hustle and bustle. Just sit and listen to the ocean.

**★★★☆☆ Lydia Chong — a month ago

A bit disappointing as not much to see really other than the cave with sea water thundering through. It is a natural wonder but not worth all the while to come just for it. The coastline nearby is worth visiting, best to combine with a visit to Cascais which is a cosy and lively coastal town.

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