The cave is essentially one huge room that you will traverse through. Within this room, for a short time, you will walk into an elevator-sized space inside a formation. This space does have an "almost" doorway-sized entrance on one side and a similar sized exit on the other. The foot space of the entrance and exit is narrow (for about 3-feet each) and you walk one foot in front of the other. However, you still have the doorway-sized amount of room from the knees up. Similar to the entrance/exit of this room, there is one additional area when we are walking under a formation that the foot space is once again narrow for a few feet, and you still have moving room from the knees up. In these three narrow areas, they do allow guests to hold the walls of the cave at waist height to keep your balance (and feel a little more confident). Additionally, there are a couple of rock ledges you will briefly duck your head under to move past. During the rest of the tour, you are in the big open room on concrete walkways.