Mysterious Blue Hole Deep Inside A River Cave

Watching you squeeze through that tiny space had me fearing you’d be the next strange dark and mysterious case delivered in story format

Dude, those tight spots were kinda sketchy, but the deep blue hole reminded me of places that divers fear, which could be connected to underground lakes even miles away where a change in water level can create powerful hydrodynamic forces... believe me, it's the stuff nightmares are made of.

The wild thing to consider is the 1849 guy got that deep in the cave using a flame for light.

This why I like YouTube. This video reminds me of a time before the influencers and the big commercialisation. Feels very raw and unedited. Not sensationalistic.

As a historian, the carving from 1849 was an amazing find, crazy that someone else was there not that long ago (or at least in terms of human history). Keep up the good work.

The yellow is sulpher, the spot on the blue quarts was iron.. usually iron appears oxidized ( rust coloured ) please dont be neglegent in you exploration.. that blue hole could potentially have some dangerous currents, the eddy pockets carved into tge rock passages you aproached frm indicates that at times water is flowing very very rapidly there.. venturi principal applies: an increase of velocity creates a decrease in pressure in the surrounding medium. In cave time lines thkse were formed relatively recently. Those same currents not present currently above are entirely possiblle below the ledge line. Very easy to just drop a small string with a washer on it into it first before you "dive in" to check conditions . I gather it appeared to be a spring and not a sump, and i do appreciate watching your adventures. Respectfully intended :)

Mind boggling that you guys are probably the first people to venture so deep since 1849.

just saw your channel in my recommendations love how its not click bait or trying to hype us up its just you hanging out with your friends and exploring while taking us along

I've always been scared to step on the grates at the bottom of swimming pools, because of what could be underneath. That blue hole tho... it's another level of fear inducing. Epic adventrue as always guys!

One of my favorite parts about watching your videos is noticing how supportive you guys are of each other. Every comment one person makes the other responds with supportive approval, and while ones crawling or climbing an obstacle, the other is cheering them on. it’s wonderful and surely very essential for keeping each other calm during such an extreme activity.

I just can't believe you did that, some people die in caves like that, stucked forever in tight spots... my god...

To anyone watching.. its a SUPER good idea to either have a stick or something like a sinker on a line to toss in front of you to gauge water depth before just trekking through like that. All you need is one tiny little pocket or a drop and your doing “120 hours” under water. In a cave.

I think I've had more anxiety from watching you squeeze in and out of tight spaces than raising my teenage daughter. Lol. Awesome video as always!

Absolutely crazy going in the tight crawl spaces. What happens if you get truly stuck in a passage. Was scary looking at it. Made me feel very uncomfortable and worried for these young people. 😮

The tiny spots you guys squeeze yourselves in and out of are both terrifying and extremely impressive

So you guys went into and came back out of a spring at the source of a creek or river. Really cool to see those from the inside, and see how the aquifer is 100% connected. Do you guys ever check a map to see which rivers you might be splashing through the underground, unknown portions of?

I have claustrophobia and it’s hard to watch you guys go through those tight places! Cave is awesome ❤

Really makes you wonder what amazing things are out there that we still haven’t discovered.

I love caves with underground lakes and rivers, but that subterranean cascade was off-the-charts cool! Way to go!

Oh!!!!!! 🤩the water was so clear 😍 beautifull cave with underground lakes and river. Thanks dears frnd🙏🙏🙏🙏