| The volcano summit |
| The volcano crater is 6 miles wide and erupted recently in 2003 |
| A lava tube at the surface, partially collapsed |
| Ferns and liverworts thrive in the moist air only in niches protected from intense solar radiation |
| Unprotected lava and cinders are blasted by the sun, creating a desert in a moonscape |
| A lava tube |
| A cinder field |
| Flowing lava cooled |
| Exploded lava cooled |
| Lava clinkers |
| The trail runs through acres of ash fields |
| Landscape of the moon |
| The volcano brought molten minerals to the surface |
| A rainbow of earth colors |
| A steam vent |
| A fantasy of rock formations |
| We rode horses up the volcano on Isabella, Volcán Negro |