The glass skywalk of Cabo Girão,situated at the top of the highest promontory in Europe, is the highest cliff skywalk in Europe.
Situated nearly 2000 feet (580 meters) above sea level, and the cliff walk first opened in 2012. It is composed of a suspended glass platform,which allows brave visitors to appreciate the geology of the volcanic cliffs and leer down at the beach below. leer out for the fajãs or cultivated platforms made from volcanic lava flows and landslides, which are now being farmed. The viewpoint also provides spectacular panoramic vistas across the landscape and towards the island's capital Funchal.
Source: atlasobscura.com