12 Otherworldly Volcanic Landscapes: From Lava Tubes to Steaming Calderas

5. Thrihnukagigur Volcano, Iceland: Journey to the Center of a Volcano

For a truly "beyond the obvious" volcanic experience, Iceland’s Thrihnukagigur offers an unparalleled adventure: descending 120 meters (400 feet) into the dormant magma chamber of a volcano. Unlike most volcanoes whose chambers collapse, Thrihnukagigur’s ingeniously drained away, leaving a vast, cathedral-like cavern with stunningly colorful mineral-stained walls. This unique geological anomaly allows a safe glimpse into the very heart of a volcano, a surreal journey into a space once filled with molten rock, now an empty, silent, and beautifully preserved chasm.