The 'Inside the Volcano' tour really is quite self-explanatory. You get to go inside a volcano. But you won't need to tiptoe around any lava because the Thrihnukagigur volcano is completely dormant, which makes it safe to explore its innards.
The tour comprises a 45 to 50 minute hike to get to the crater of the volcano, before jumping on an open cable lift that descends 120 meters to the bottom of the crater. Unsurprisingly, this isn't a hike for people with severe physical limitations. At the same time, you don't need to be extremely fit either. You just need to be up for walking on an uneven surface, and don't need any special knowledge of hiking and climbing.
The 'Inside the Volcano' tour is a fabulous opportunity to witness the earth's machinery from the inside and gain some perspective on the beauty and power that lies in our planet.