Explorer Albert Lin descends into an epic underground cavern

[Music] [Applause] I'll take that, yeah, the ASAP. Okay, you're double backed. I'm double backed. Rising to over 9,000 ft, these mountains have a different climate to the aid deserts below. During the monsoon season, rainstorms can lead to flash floods, creating a significant impact on anyone living here.

Colag tells me, "On the mountains, the El—” to understand these mountains, you have to go down there. You have to go inside.

"Okay, so who's going first?"

"You're going first?"

"No, no, no, you go."

"You don't trust me?"

"Okay, I'm going first."

"You safy y CL in, don't unlock the harness. Is good, yeah?"

"Double backed. I'm ready. Let's do it, let's do it."

"I'm walking the same line."

"Oh my [Music] God!"

"Give me a little slack!"

"Happy to be the first?"

"No [Music]. Enjoy the [Applause] descent."

"Oh man! [Music] Wow, this cavern is over 300 ft deep and hundreds of feet wide. Wow, look at this! It's like an underground cathedral!"

"[Music] Man, Albert, are you down?"

"I made it! I'm going to get out of the way and then make your way down. Look at this place! Yeeha!"

"[Music] C, there's a little speck! Wow! You never would have imagined standing on the top that this was down here. What a place!"

"Hey, hey! I've been in many caves, but nothing like this. It's not only desert here; this is all the work of the water!"

"What? Yes, this is limestone, of course, and it was practically carved by water. You know, raining water. I mean, this takes a lot of water to make something this big, eating away over time."

"Oh yes, yes! There are so many others; it's like swiss cheese! You have holes everywhere. Some of them are broken and empty, and the other ones are still full."

"Wow, that's amazing!"

[Music]