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Boca do Inferno, Cascais

(2,200+ reviews on the web)
Geologic Formation
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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Reviews
TripAdvisor
  • Has very little of hell as we are told that hell is!! Definitely a beautiful place to visit!
    View original
  • ...and crashing - the Atlantic waves on the rocks, west of Cascais. A lovely 20 min walk from the town gives you sight of a natural phenomenon worth the visit - and no entry fee. We were there at the ...  more »
  • Lovely walk along the promenade to the boca do inferno super coastal views and lots of wildlife there is cafe and shop there too  more »
Google
  • Great sunny day visit during the week to get away from it all. Gets busy on weekends. Good views but there is a bit of litter about.
  • More or less interesting. While I like geological phenomena, it is not as impressive as other sinkholes. It looks nice with rough weather. Even in the same area near Adraga beach there is another similar formation, in my opinion, more spectacular
  • Great views, we walked from cascais town and took about 20mins stroll to the viewpoint. Doesn't cost anything to view.
  • Natural beauty, along the sea! Scary, but amazing view from the coast and the sea along Sintra/Cascais!
  • It's OK - nice viewpoint over the shore, but the shore itself is not that much. Close to Cascais though, and you can rent a bike at several places along the coastal bike pad.