Oh, I'm a little bit nervous, but in an excited way to see it.

So I think it's best to just walk that way, get down.

Just go in.

Yeah.

Okay.

Let's just put on a bit of light.

It's never really light down here, because as you can see, there is no way of the light

actually entering the space.

It wasn't built for us to be inside it, so it's something different.

So we're completely enclosed underground.

How would you describe this smell?

I'm Sarah Wyman and this is Atlas Obscura, a celebration of the world's strange, incredible

and wondrous places.

Today, I'm standing inside this massive man-made cave under the city of Copenhagen.

It's a sister built in the 1850s to supply the entire growing city of Copenhagen with

fresh water.

But then, in the 1930s, the sister was emptied and closed up, and pretty much everyone forgot

about it.

Until decades later, when a group of artists and curators rediscovered this place and

transformed it into a kind of canvas.

Now every year, a new artist is invited to exhibit their work in this space, and the

space itself becomes part of the artwork.

...