Ancient People Existed Inside This Sealed Cave

Gas detectors are a must in an environment like this - I recently did confined spaces training and it's scary how easily you can succumb to a lack of oxygen or noxious gases without even realising the danger.

You guys need to cary an air quality sensor. They're only a couple of hundred bucks and it might save your life. Maybe a subscriber can hook you up with one?

That sulfer smell could be a sign of hydrogen sulfide. Hopefully y'all use detectors in the future when you encounter the smell. I hardly know you, but I'd like to see you fellers stay among the living.

The WPA on that sign means Works Progress Administration, created by Franklin D. Roosevelt in 1935. The aim was to provide jobs and infrastructure during the Great Depression. The WPA undertook a wide range of projects, from building roads and public buildings to mining. The WPA likely sealed this mine to protect public safety from the dangers of toxic gases and an unstable structure.

Another way for an arrow head to end up deep in a cave, is the game was hit, but ran in there to die.

It’s absolutely crazy to go in with no gas detector and being that loud in a unknown cave with cracked slabs of rock on the roof they could come down very easy

The mineral staining you see are white is Hydrozincite, black is manganese, red is iron, yellow is sulphides.

I spent years underground and scaling walls and backs (Roof) was done everyday. Mines are constantly caving in as the rocks expand and the crushing weight does it's thing. The slabs above you can be pried down with the slightest bit of leverage. You can even do it by hand and it's impossible to tell if one will bring the rest down. Sometimes, you can't see if one is about to fall until you walk under it to the other side of it. It's the walking under it that freaks me out and I would even be afraid to raise my voice in there. Interesting video, thanks.

Sounds like two of the Teenage Mutant Ninja Turtles gone exploring. 😂

It really resembles a cave more than it does a mine

Yeah, about 2 minutes before they say they don’t think it’s a coal mine, I was thinking exactly that. Because there are no coal seams, no equipment left behind. It’s just a very dangerous cave where the roof could collapse in on you.

I love how genuinely happy and excited they sound to explore.

Federal Government says stay out, lets go in... Whats that foul smell? I found an arrow head, lets give it to authorities.

I felt like I was spelunking with Bill and Ted in this video. PARTY ON DUDES!

So nice that I can sit here in my recliner and vicariously explore the cave with you.

I finally went into this giant collapse nobody knows about in the Treadwell Mine in Juneau, it indeed goes down about 500ft to an underground lake that was I think an underground train passage and the ceilings are 100ft+ in some areas easily, there are passages into the mine off the sides of this collapse. The main mine has stopes that are more like 500-1000 feet deep underground haha and an 8 mile train tunnel you can get from one mountain valley to another

Caves are really dangerous. That sulfur odor is likely H2S gas which can kill you. There is a reason they would take birds into the mine. If the bird died, then you knew to get out of there.

That white slime is a bioluminescent algae if you would have turned your lights off you probably would have seen blue light everywhere

Ever heared of miners having a bird with them for the gasses as they would die way before people would be effected. That smell is a very bad thing

The WPA was disbanded years ago, but their records are somewhere. If you care to research this place, call your Representative in the House and ask them to help you locate the records about this mine. Or ask a local librarian. They love to do research.