Near the small village of Bellavista you can explore amazing underground lava tubes. The mile-long tunnels, tall enough to walk through, were created when flowing lava cooled more quickly on the surface than below, forming a crust that enclosed an underground labyrinth. To reach the tunnels from Puerto Ayora, head north on the road to Bellavista; turn east at the cross street and walk about a mile until you find a farm with a sign that announces "los túneles". A small fee is collected by the owner, who also provides flashlights.
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