Boca do Inferno

This waterfront feature is where the waves crash against the rocks creating some sea spray and drama. Boca do Inferno is one of those rare places where nature leaves you speechless. The dramatic cliffs, the sound of the waves crashing into the rock, and the raw energy of the ocean create a truly powerful atmosphere.

São Tomé, the larger island, is known for its vibrant culture, colonial history, and bustling local life, while Príncipe offers a quieter, more intimate escape with pristine beaches and lush rainforests.

A little over a mile west of the popular beachside town of Cascais, getting to the Boca do Inferno is straightforward. Most day visitors arrive by train from Lisbon, as there is a direct service from the downtown Cais do Sodre station, running every 20-30 minutes during daylight hours.

Just minutes from Cascais' center, Boca do Inferno (“Mouth of Hell”) is a dramatic rock formation carved by the sea, where Atlantic waves crash through an open arch, creating thunderous sounds and spectacular sprays. Its name comes from the wild, almost otherworldly power of the ocean here – especially on stormy days.