
Castel Sant’Angelo in Italy The Real-Life Inspiration Behind One Piece’s Impel Down
One Piece fans often wonder about the real-world inspiration for Impel Down, the most secure prison in the series. Scholars and fans alike point to Castel Sant’Angelo in Rome, whose labyrinth-like structure and role as a fortress and prison strongly resemble the fictional setting. Visiting the castle offers not only a journey into history but also a deeper appreciation of the story’s world.