We walked along the Atlantic coast, from Guincho to Cascais. Shortly before Cascais we passed the Boca do Inferno, already seen in several videos where high waves break on the rocks. But the Atlantic was absolutely calm and smooth, almost not a single wave perceptible at all. At first we were a bit depleted, but even without waves the rocks worked by the water fascinated us with the opening to the Atlantic! You can go quite far, almost down to the sea and look at the "mouth" from the front. On that day the waves at "us" at Praia do Guincho were much stormier and wilder. Maybe the waves here in winter are different, that would certainly be interesting? So we settled for the uniquely shaped rocks and the beautiful view of the sea...

30 minute walk from train station hugging the beach takes you to this impressive rock formation. Haven for photographers - loved the plaque that paid tribute to Aleister Crowley too. Very craggy and steep staircase down to main view point. While I agree with views on stalls, we just needed an ice-cream and a cold drink before heading back into town. Worth a visit.

I knew in advance that this place is only special during storms, so I wasn't surprised that since the sea was calm when we were there, this was nothing spectacular. We had already been to other beaches in Portugal and so even though the water hitting the rocks was pretty, you can see the same thing at any other beach in Portugal and not have the same crowds. I would love to be there on a stormy day.

Everyone comes here and it is a nice walk along the sea from the city. But once you get here you will find a fence that keeps you from getting too close to the rocks and the ultimate view of the cave below. And there are restaurants here plus a souvenir market. The walk was better than the destination.

We came across Boca do Inferno while taking a walk along the Cascais coast. We stopped for a few minutes to watch the water and take some pictures. It wasn’t that exciting, especially if you compare it to what we saw in the Algarve. It was ok but I wouldn’t make a trip just to see this.

You can reach the cliffs of Cascais very well on foot. There is a walkway/bike path. Nice walk along the coast. There is a small market by the cliffs. Only older locals have a stand here. If you need souvenirs, I would recommend buying here. Relaxed strolling, no aggressive sales behaviour. There is also a restaurant and two cafes.