Canyon Gorropu is considered to be the deepest in Europe. To appreciate its beauty to the full, put on your walking boots and get ready to cover 4km/2.5mi including a 650m/2,132ft change in altitude. You will be rewarded with breathtaking landscapes, where vineyards alternate with limestone rocks, juniper bushes and green oaks rub shoulders with ruined cuiles (shepherd's huts) and where Monte Oddeu rises up, like a giant climbing wall. Plan on spending the whole day.