In Germany, there is Lake Geiseltalsee — a former coal mine that was deliberately flooded with water

Jul 23, 2026 6:07 PM

Beneath the crystal-clear water, real forests, roads, concrete structures, and minerals left from the mine can be found.

I saw this yesterday, thought it was Tennessee, damn you TVA!

1 week ago | Likes 1 Dislikes 0

I hate diving in underwater forests like that. It's so uncomfortable

1 week ago | Likes 2 Dislikes 1

Why does this look like a trailer for a bad video game?

1 week ago | Likes 1 Dislikes 0

As a former film editor, can I say that this piece terribly edited. The eeriness of the scene is completely spoilt by the abrupt jump cuts and the editor has not allowed the shots to breathe and the rhythm of the piece to build.

1 week ago | Likes 1 Dislikes 0

idk if you should be swimming in mine water; just seems like a good way to get cancer

1 week ago | Likes 1 Dislikes 0

That's wild. They should do a movie with aquatic characters.

1 week ago | Likes 1 Dislikes 0

pretty cool, that looks so eeeeeeeerie

1 week ago | Likes 1 Dislikes 0

Now put some kind of enchanting wonderland music over it, see what happens.

1 week ago | Likes 1 Dislikes 0

Crazy!

1 week ago | Likes 1 Dislikes 0

Watch out for meteorites emitting a strange color.

1 week ago | Likes 1 Dislikes 0

Is there a filter applied, why does it look so weird color-wise?

1 week ago | Likes 1 Dislikes 0

Water is very effective at filtering different wavelengths of light as you go deeper. It's amazing how much colors change when you turn on a flashlight scuba diving

1 week ago | Likes 4 Dislikes 0

looked it up, this used to mine lignite specifically in east germany, and after reunification, the mine was shuttered in 1993 because of newfound competition from international oil and increased non-ceo awareness of lignite's effects on the environment (i.e. the most fucked up fossil fuel imaginable). filling the mines with water simply happened to be the government's preferred plan to keep the space from going to waste, taking after the 1967 creation of lake senftenberg (also in east germany).

1 week ago | Likes 1 Dislikes 0

That would be so cool to cruise through the water like hat in that Erie environment

1 week ago | Likes 1 Dislikes 0

Read ZOMBIES FROM THE GENE POOL by Sharyn McCrumb. Good mystery novel on 50's fandom.

6 days ago | Likes 1 Dislikes 0

Not healthy to breath there

6 days ago | Likes 1 Dislikes 0

Where’s the park that’s only underwater SOMETIMES

1 week ago | Likes 2 Dislikes 0

I’m channeling an Imgurian named Huleeb!

1 week ago | Likes 2 Dislikes 1

It’s so clear because they used Fiji water

1 week ago | Likes 3 Dislikes 0

In Germany they call a lake "See" and the sea "Meer". In Dutch we call a lake "Meer" and the sea "See". That makes a mermaid in Dutch: "Zeemeermin" and in Germany "Meerseemin" but they call it a "Meer Jungfrau" like a Sea young lady. Well yeah ok.

1 week ago | Likes 6 Dislikes 0

Languages do be like that sometimes.

1 week ago | Likes 3 Dislikes 0

Silent Lake

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1 week ago | Likes 5 Dislikes 0

They’re covering something up

1 week ago | Likes 2 Dislikes 1

We have Lake Lanier in Georgia. Just north of Atlanta. It's always talked about on soc media for being "haunted" or "cursed" because of the yearly drownings.

Seven hundred deaths since 1950.

When they downed the trees before flooding they left them where they feel. So they're laying sideways with outstretched limbs.

There's also a high-school football grandstand underneath amongst other things to get entangled in.

1 week ago | Likes 17 Dislikes 2

Thar's Nazi gold in that mine!

1 week ago | Likes 2 Dislikes 1

80m = 421 bananas

1 week ago | Likes 14 Dislikes 4

for a second I thought it was the unitconversion bot replying!!

1 week ago | Likes 4 Dislikes 1

Stacked end to end or on their sides?


Inquiring minds want to know.

1 week ago | Likes 2 Dislikes 0

Using that scale, that's a 0.5m banana.

1 week ago | Likes 1 Dislikes 3

I'm sorry to say that it's more like 0.2m

1 week ago | Likes 3 Dislikes 0

80 meters ≈ 260 feet

1 week ago | Likes 6 Dislikes 5

@UnitConversionBot 80m = x bananas? I'm checking someone's math.

1 week ago | Likes 3 Dislikes 1

I'd say it's definitely less than 421.

1 week ago | Likes 1 Dislikes 0

mid level progress in survival/horror rpg.

1 week ago | Likes 79 Dislikes 2

Imagine the horror on the divers if they just see a dude just casually walking around like he's not underwater.

1 week ago | Likes 4 Dislikes 0

We need a horror game where the progressing requires you to dive but not all the time. Getting in and out of dark water is horrifying

1 week ago | Likes 12 Dislikes 0

By deliberately, you mean they stopped paying for running dewatering pumps. I work on a lot of mine dewatering projects. It ain't easy keeping mommy earth's holes dry

1 week ago | Likes 69 Dislikes 4

As someone who dug an old pond to redo it completely, I can confirm... While it's not coal mine big, it was raining, taking 5 days to fully dry (if it was sunny) and then it would rain again... I can only drink so much chocolate milk!

1 week ago | Likes 8 Dislikes 0

phrasing!

1 week ago | Likes 3 Dislikes 0

TIL you have a day job

1 week ago | Likes 2 Dislikes 0

Yes, geologic engineer is my muggle job. But I'm pretty semi-retired from that lately. Only do consulting here and there on projects I find interesting.

6 days ago | Likes 1 Dislikes 0

That looks like a little more water than a simple case of “stopped the sumps” and like maybe they deliberately flooded a whole valley including whole trees and stuff… maybe that’s just me though

1 week ago | Likes 6 Dislikes 2

The trees grew prior to reclamation work. Not exactly relevant to groundwater recharge, that can happen suprisingly fast. But I did read up a bit on this particular site. They are adding water to increase groundwater supply via infiltration in the area because the aquifer was so heavy damaged/depleted

6 days ago | Likes 1 Dislikes 0

No, those mines were flooded, It took years of course. Here are some pictures: https://www.lmbv.de/aufgaben/wassermanagement/flutungsstand/

1 week ago | Likes 15 Dislikes 1

Interesting. Reading what I could from the german translation, it looks like they are adding water here to recharge the entire aquifer system. It apppears to have been severely devastated in the general area, not just at the mine in particular. Of course, they didn't provide many technical details. Here we re-inject or use infiltration ponds so we don't devastate the the aquifer as bad as seems to have happened here

6 days ago | Likes 2 Dislikes 0

They are basicall adding water to restore nature where operative mining has been terminated. There is no coal left.
There are a few of such lake chains now in Germany, mostly not yet completed. The lake mentioned by op is one of the biggest.
This is another good example with some background: https://en.wikipedia.org/wiki/Lusatian_Lake_District

5 days ago | Likes 1 Dislikes 0

Can’t they just be moist?

1 week ago | Likes 14 Dislikes 0

NOW you're speaking moistly.

1 week ago | Likes 2 Dislikes 0

I guess they can have a little moisture, as a treat.

1 week ago | Likes 7 Dislikes 0

No, we are Germany. A real country. Not Russia, not China and not the US. A real country.and by the way, the us belongs in that sentence forever.

6 days ago | Likes 1 Dislikes 0

Hmmm, an odd thing to say as I just read up on this project and they have had to do a lot of extra work we don't at mines I work on. EXACTLY because of even longer span of poor mining practices. So in this particular case you are much worse. But at least trying to fix it. They weren't able to let groundwater to recharge naturally like we do because the entire aquifer was so severely damaged.

6 days ago | Likes 1 Dislikes 0

We flood tagebaulandschaften, since the nineties. We have several ne lake destructs because of it. I live near one. This is civilisation, not end stage capitalism US. And it is not a mine of course, cuz there are no trees in mines

6 days ago | Likes 1 Dislikes 0

Here is where ancient forests were destroyed for your CURRENT mine. Soon it will be turned into a lake too https://en.wikipedia.org/wiki/Hambach_surface_mine

6 days ago | Likes 1 Dislikes 0

That forest still stands :)

Cuz here we rule over the rich. Not like you billionary simps.

6 days ago | Likes 1 Dislikes 0

It is literally an abandoned mine undergoing reclamation. Trees are usually planted to aid in soil reclamation. And germany is well known for its destructive mining practices, so you can get off your high horse.

6 days ago | Likes 1 Dislikes 0

I don’t know about English bit in German there us a difference between Tagebau (a open hole in the ground) and mines (a Saft deep underground to 100s or thousand of meters underground. This is the first kind.

6 days ago | Likes 1 Dislikes 0

And we flood empty Tagebaue. We don’t let our rich folk run as rampant on our environment as you.

6 days ago | Likes 1 Dislikes 0

seems they diverted a nearby river to flash flood it as coal would create an acid lake if left to natural flooding.

1 week ago | Likes 5 Dislikes 1

Wut? They are using this as a groundwater recharge basin because the whole aquifer is so hammered. The water source doesn't change the rock chemistry. Acidification is still a huge concern and has to be addressed on top of this (which would happen either way)

6 days ago | Likes 1 Dislikes 0

Looked at its wiki page. Says the pyrite in the area was a concern for allowing it naturally fill as it would create a sulphuric acid lake for how long it'd take so they diverted the river to quickly flood it. That not the case?

6 days ago | Likes 1 Dislikes 0

They are adding water so it soaks in and recharging the groundwater. The pyrite is still there and creates acid, no mater the water source

6 days ago | Likes 1 Dislikes 0

Quick chemistry look up says it cuts the amount of oxygen present slowing the creation of avid. Other sources I'm seeing say that and speeding up the usable lake are why they chose diverting the river rather than allowing it to fill naturally.

6 days ago | Likes 1 Dislikes 0