Cueva de los Verdes

<p>Part of the same lava tube system as Jameos del Agua — 6km long (1km open to public). Guided tours through dramatic lava formations. Optical illusion at the end is a famous surprise. Great acoustics — concerts sometimes held here. €10 entry. Combine with Jameos del Agua (same road). Allow 1hr. Cool inside — bring light jacket year-round.</p>