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Translated as “Hell’s Mouth,” Boca do Inferno is a coastal rock formation just a short walk or bike ride west of the seaside resort of Cascais. See the rock arch and cove formed after the collapse of a coastal cave, the result of endless pounding of powerful ocean waves.
Take a walk along the 1-mile (1.5-kilometer) path that leads from the center of Cascais to Boca do Inferno. The picturesque walk takes you past the scenic Cascais Marina and the iconic Santa Marta Lighthouse. Take your time on your way to chat with the local fishermen who cast their lines from the rocky shores leading up to Boca do Inferno. A cycle path also follows this route and there is an access road for vehicles, if you want to opt for a quicker alternative to walking.
Tread carefully when you arrive at the arch because the path continues on down the cliff face. Enjoy the impressive close-up views of the clear blue water that washes in from the ocean. Notice how over millennia the softer rock was eroded by the waves to form a cave, which then partially collapsed in on itself to form the perfect arch and natural pool you see today.
Head to the lookout point for the best views of Boca do Inferno and the Atlantic Ocean and watch in awe as the waves crash against the rocks at the bottom, creating a foaming mass of white water. This powerful flushing motion inspired the name of Hell’s Mouth.
The spectacle is especially impressive to watch during rougher weather if you are willing to brave getting wet and windswept. Milder conditions in the summer still provide very enjoyable views.
Return to Boca do Inferno in the late afternoon for a chance to catch a beautiful sunset over the rocky coastline and ocean. Bring a picnic and a bottle of local wine and find your own private spot along the coast to be one with nature.
Boca do Inferno is on public land and is accessible at all times, free of charge. It is easy to reach on foot or by bike, but if you decide to come by car, there is a car park next to the on-site restaurant.
Situated near the beach, this luxury hotel is within 1 mile (2 km) of Tamariz Beach and Cascais Beach. Duquesa Beach and Estoril Conference Centre are also within 15 minutes.
Situated in a regional park, this luxury aparthotel is within 3 miles (5 km) of Oitavos Fort, Cascais Beach and Guincho Beach. Boca do Inferno and Cresmina Beach are also within 3 miles (5 km).
This family-friendly Cascais aparthotel is located on the boardwalk, within a 15-minute walk of Tamariz Beach and CascaisVilla Shopping Centre. Estoril Casino and Cascais Beach are also within 1 mi (2 km).
This family-friendly Cascais resort is within 3 mi (5 km) of Oitavos Fort, Cascais Beach and Guincho Beach. Cascais Municipal Market and CascaisVilla Shopping Centre are also within 3 miles (5 km).
Situated near the boardwalk, this luxury hotel is within a 15-minute walk of Santa Marta Lighthouse Museum and Cascais Beach. Marechal Carmona Park and Condes de Castro Guimaraes Museum are also within 10 minutes. Cascais Station is 18 minutes by foot.
This family-friendly Cascais hotel is within a 5-minute walk of Estoril Conference Centre and Estoril Casino. Cascais Beach is 1.6 mi (2.6 km) away. Estoril Station is 5 minutes by foot and Monte Estoril Station is 14 minutes.
Located in the heart of Cascais, this luxury hotel is within a 15-minute walk of Santa Marta Lighthouse Museum and Cascais Beach. Condes de Castro Guimaraes Museum and Cascais Marina are also within 5 minutes.
This family-friendly Cascais hotel is located in the entertainment district, within a 10-minute walk of Estoril Casino and Estoril Conference Centre. Cascais Beach is 1.5 mi (2.5 km) away.