The buggy hums at the edge of the cliff, engine a steady heartbeat beneath the volcanic sky. Dust rises in a ribbon as the convoy peels away from the refinery-slick resorts of Costa Adeje and climbs into a different Tenerife — one of jagged ridgelines, deep ravines and terraces clinging like old lace to the mountain. By the time the Guia de Isora office fades behind you, the road has narrowed, hairpins multiply, and the island’s geology begins to speak: basalt bedrock sliced by time, cooled lava layered with windblown soils and rains that have carved the Teno massif into dramatic gullies.