I did the abyss. The guides were very good and kne...

I did the abyss. The guides were very good and knew what they were doing. We were trained with absail and then descended into the cave for a couple hours of being guided through the dark passage ways to find the glow worms. Activities included zip line and jumping into an underground river. We were given snacks at regular intervals and once it was all over there was soup and bagel waiting. However it's worth noting that in parts the cave can be uneven with sharp edges that need to be careful when traversing.