The Lava Tunnels, located on Santa Cruz Island in the Galápagos, are remarkable volcanic formations created by ancient lava flows. Visitors can walk through these naturally formed underground passages, explore their impressive arches and caverns, and experience the unique geology shaped by eruptions thousands of years ago. Notably, the tunnels are among the largest in the Galápagos, with some stretching several kilometres, and they provide insight into the islands’ volcanic origins while offering a fascinating adventure for travellers seeking both natural history and exploration.