You have 2 choices for descending into the cave, at the level of the Big Room. Either the elevator or the natural entrance.

If you choose the natural entrance, it will take you around 1 1/4h to descend from the entrance of the cave to

the level of the Big Room.

The entrance to the cave is a few minutes away from the visitor center.

You need to be in reasonable physical shape to attempt this descent.

The descent ends in the Big Room. From there you can enjoy the Big Room or join some of the other tours that are offered.

There is no extra fee for this tour, it is included in the fee that you need to pay to enter the caverns.