Cueva del Viento is the largest lava tube system in Europe, and the fifth largest in the world, behind a series of lava tubes in Hawaii. It is also considered the most complex volcanic tube in the world, due to its morphology of several levels and passages.It was created by lava flows from Pico Viejo, next to Mount Teide. The cave is located in the town of Icod de los Vinos in the north of the island of Tenerife, Spain.
It extends more than 17 kilometres and contains three different levels of passageways, each full of geomorphological phenomena such as lava pits and terraces.
Wikipedia https://en.wikipedia.org/wiki/Cueva_del_Viento
Official Website http://www.cuevadelviento.net/
Address Camino del Sobrado, 38430, Spain
Coordinates 28°20'37.756" N -16°41'53.82" E