Leidarendi is one of the most untouched, yet easily accessible lava caves close to Reykjavik. The reason why it is less visited than other lava tubes is because of its structure inside. It is not a cave that has proper wooden planks for walking on therefore good sturdy hiking boots are recommended. It has some optional areas where you can crawl through allowing for a more adventurous visit but there are other areas that are accessible for and easier journey and yet end up at the same place, making it a loose figure of 8.
We normally explore all the cave has to offer as we have small groups of participants, but this can vary depending on who we have in the group. In total the cave is 900 metres and it offers unique rock formations, you and your guide will stop at various locations and hear the dark story about how the cave got its name as well as the geology of this and other lava caves.