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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
  • Beautiful rock formation With hollowed cave having an opening out to sea worth stoping to visit and take memorable pictures 
  • The sea splashing through the rocks on a stormy day shows the power of the sea. Whether it be sunny or rainy, it is a must see spot in Cascais. 
  • I am biased, I live in Cascais, a multifaceted place that I love. I like to enjoy the "Boca do Inferno", the force (not always quiet) the sea enchants me. Without being something absolutely extraordinary, is certainly a good choice almost indispensable for anyone who has the good fortune to be able to visit Cascais ...
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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.