Trip Planner:   Europe  /  Portugal  /  Central Portugal  /  Lisbon District  /  Cascais  /  Nature  /  Boca do Inferno
Boca do Inferno, Cascais
(4.1/5 based on 2,000+ reviews on the web)
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
  • If you are in Cascais and you want to walk a bit, the walk's worth... but otherwise, don't expect a great show! There is a most beautiful sites of cliffs and waves! But sometimes it's good to stretch the legs and the ride to get there is correct!
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  • this is one of the most beautiful cliffs and areas in Cascais Portugal. its a bit tough walking out on the rocks and gets wet during high tide. Bring your hiking shoes 
  • Do not necessarily a detour if you are staying in Lisbon, but if you're in the vicinity, it is a must-see!
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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.