https://34travel.me/post/transilvaniya-6-gorodov-kotorye-perevernut-predstavlenie-o-rumynii
The cave is 30 floors deep, inside of which you can ride a Ferris wheel or a boat - on the underground lake. The height of the “ceilings” in the main hall is 80 meters (32 floors). You can take the elevator down, but it is better to go down on foot - in order not to miss the long gallery of Franz Joseph, a room with an echo (repeats after you everything said 10 times, no less).