Tucked quietly behind the thick walls of the former royal palace on Paris’ Île de la Cité lies a chapel so stunning, it feels like stepping into a kaleidoscope made of medieval dreams. Welcome to Sainte-Chapelle, one of the most breathtaking expressions of Gothic art and architecture in all of France—and yet, somehow still overlooked by many visitors.

If you’ve ever dreamed of swimming with jellyfish without turning into a human pincushion, your fantasy is not only possible—it’s floating in the heart of Indonesia.