Boca do Inferno.

Boca do Inferno, or "Hell's Mouth," near Cascais, Portugal, offers a striking blend of natural beauty and historical intrigue. This breathtaking cliff formation features a dramatic cave and archway carved by relentless Atlantic waves, creating a mesmerizing spectacle as water crashes through the arch, especially during winter storms. The site is also notable for its connection to infamous occultist Aleister Crowley, who faked his death here in 1930, a story etched in a commemorative plaque that reveals his elaborate deception. Easily accessible from central Cascais, visitors can enjoy a viewing platform, a seafood restaurant, and local markets, while staying cautious along the perilous cliffs. Boca do Inferno is a must-visit for nature lovers and history buffs alike.