El Caminito del Rey (The King's Little Path) or El Camino del Rey (The King's Path) is a concrete walkway which winds precariously above the narrow gorge of El Chorro in the Andalusia region of Spain. It is 1 metre wide and has no handrail for most of its length. Chunks of the path have fallen away. It is highly dangerous and (I believe) illegal to walk it. I wouldn't attempt it in a million years - I have a poor head for heights. But some brave souls seeking adrenaline kicks do walk it - as this YouTube video shows. Don't watch it if you value your stomach. It's scary!