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Boca do Inferno, Cascais

4.1
#1 of 11 in Nature in Central Portugal
Geologic Formation Nature / Park
Boca do Inferno, or "The Mouth of Hell," features a natural rock arch with a cave that is known for sucking in ocean waves and shooting water out the top. Nestled in a dramatic environment of eroded cliffs and enormous waves, the site is a well-known photography spot. You can easily reach it by foot, and then follow stairs and bridges around it to get a better view or climb down to the cave if the ocean is calm. Be aware, however, that locals advise against climbing due to the sharp rocks. Put Boca do Inferno on your schedule, and learn what else deserves a visit by using our Cascais trip generator.
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Where to stay in Cascais

The seaside resort town of Cascais, one of Lisbon's wealthiest suburbs, offers solid options for both enjoying the sun and surf and getting away from the bustle of the capital. By staying right near the beach, you'll be within easy walking distance of both the soft sand and the restaurants and bars of the town center. Most of the bigger hotels along the waterfront and near the marina provide balconies and sweeping views over the ocean as well. However, you can also check into a smaller guesthouse for a lower bill and equally good location in the center of town. Grabbing a room at one of the guesthouses or hotels in nearby Estoril offers a similar beachfront experience not far from Cascais itself, plus this location offers more in terms of choice.
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  • Boca do inferno or the devil's mouth is fascinating to see, and it only takes a couple of minutes. So I would say it is definitely worth a stop  more »
  • Of course Ireland is further west and part of Europe, but this point is the westernmost point of the continent of (mainland) Europe. You'll see this as you pull out of Cascais on the way to Sintra  more »
  • Is this a thing? Perhaps we missed the point, but aside from the cheap souvenirs, there is nothing of interest.  more »
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  • You have a great view of the Atlantic ocean and the cliff. It is mesmerizing to watch the waves crashing through the opening in the cliff and retreating a moment later. Boca do Inferno can be reached by car, bicycle or on foot. We choose to walk there because you can get at place quite near the ocean and you can climb on some big rocks to get a better view and shoot some photos.
  • Probably the only place worth visiting other than​beaches. The access is easy. And the cliffs are amazing. Fun to watch the water crashing the rocks
  • A really nice experience. Biked there from Cascais ob my way to Guincho beach. The waves and the sounds made a great show!
  • Great view, you can hear water gushing in and out as if someone is roaring. Watch for the sign sometime tides are high.
  • I could just sit there and watch waves all day. Sun and cool breeze. Literally a little piece of heaven on Earth. PS. Have some change to use the restrooms around and parking is a bit difficult to find.