Boca do Inferno in Cascais
One of the most famous places to visit in Cascais is “Boca do Inferno” (portuguese for “Hell´s Mouth”- literal translation), this is a unique rock formation on the edge of the ocean. It is believed this place use to be a cave that over time and by the force of the sea relented and gave rise to the scenario as it is known today. Currently Boca do Inferno is an open cavity, with a sort of arch where it enters the sea water.
In days of rough waters it is possible to hear the sound of water hitting the rocks, such a unique sound that makes an analogy to the location´s name. Arriving at Boca do Inferno is possible to contemplate the beauty of the place from the top, however there is also a path that leads to the other side of the “arc” of the cavity, where the water enters. This site is already very close to the water and then you can enjoy the view across the rocky coast.
This is a great point to include in an one day trip to Sintra and Cascais, from Lisbon. You can start the day with a Travesseiro in the famous Piriquita, than visit the Pena Palace and the Moorish Castle. After that, it is time to go to the Cabo da Roca and Boca do Inferno. To finish the day visit the Cascais Village and then you can go back to Lisbon just by the river, passing trought Estoril. If you´re not in a rush, there is a bike path along the coast with an amazing view. You can rent bikes in the area to better enjoy the ride.
The video below shows an unusual day with very strong waves. It is possible to listen the wind and the sound of the waves in the rocks.