translation.en: When you enter a quartzite cave, you have to completely forget what you know about caves -- classic limestone caves or the touristic caves that you can visit in several places in the world.
translation.zh: 当你进入一个石英岩洞穴时， 你不得不将以往对洞穴的 了解都抛在脑后—— 我说的是典型的石灰岩洞穴， 或者说观光洞穴， 你在世界上很多地方都可以找到。