Ruta del Cares, Picos de Europa
Right up in the north of Spain, a 2.5-hour drive from Bilbao, the Ruta del Cares is one of the most popular and most beautiful routes through the Picos de Europa National Park. Known as the Divine Gorge, the 12km (7.5mi) route follows the Cares River south from Poncebos in Asturias to Caín in León. Hikers stick to a thrilling trail that’s carved into the side of the rocks – and often through them – featuring sheer drops aplenty and caged walkways that zigzag over the thunderous current below. Expect to encounter caves, mountain goats and turquoise streams of water.