Cueva de los Verdes
Malpaís de la Corona, Haría, Spain
A guided walk through Cueva de los Verdes reveals another part of the La Corona volcanic tube. Passages, chambers and traces of flowing lava emerge under lighting designed by Jesús Soto, with an auditorium tucked into the rock. The route covers roughly a kilometre and includes stairs, low ceilings and narrow sections. Book a timed ticket online before arrival and wear shoes with good grip. The physical layout makes this unsuitable for visitors who need a step-free route.