This is a lava tunnel we went into in Santa Cruz. This one was quite short, while others on the island have been found to go for kilometres. On the way here there were some male tortoises fighting in the road, however as we approached the fight broke off and both hid until we were past.
There was not much headroom.
Some roots from trees above had made it down into the tunnel.
There were artificial lights inside, which were causing ferns to grow.
