Take A Walk On The Wild Side

This is El Caminito del Rey, located in the mountains about an hour from Malaga, Spain.  The walker is Daniel Ahnen, who filmed it in 2008.   Ahnen died in 2011 while hiking in the Himalayas.

More recently, the path has been tamed to make it safer though it still looks quite intimidating.

For the background on the path, constructed in the early 20th century, read this.