This isn't some remote rainforest island.
I am indoors, in a waterpark.
This is the largest uninterrupted indoor space in the world.
There are a few bigger spaces, but they've all got support pillars holding them up.
This is just one big roof. In terms of volume,
this is bigger than NASA's Vehicle Assembly Building.
You could fit the entire Houses of Parliament in here. Twice.
And still have room for some more waterslides.
Along with the slides, and some cabins you can rent overnight,
there is a tethered balloon that'll take you up to the rafters.
Or it'll take six passengers and go for a fly around inside.
Those panels up there: they're transparent to UV light so the trees grow here,
which means you can get sunburn... indoors.
But in winter, this place stays at tropical temperatures.
The amount of heating, cooling, water recirculation required is ridiculous.
There is no way that a company could ever afford
to build something like this, it would cost far too much,
they would never be able to charge enough for admission to make their money back.
And yet, here I am.
Which brings me to my main question:
what do you do with a disused airship hangar?
That's not just a theoretical question. That's what this is.
And actually, it wasn't so much disused as never used.
This whole structure was built on an old German airfield,
at the turn of the millennium, during the dotcom bubble.
It was designed to hold an enormous cargo-carrying airship that was never built,
because the company went bankrupt a year later as the economy crashed.
The investors lost most of their money --
it cost 78 million euro to build this thing,
it's safe to say they never got most of that back.
A company from Malaysia bought the hangar at a knock-down price,
a price that could, in theory, be made back over many years
if you, say, spruced the place up and charged admission.
Maybe added a few waterslides.
And the result is, bizarrely, the world's largest indoor waterpark
and a fluke of our weird 21st-century economy.
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