Would the super kamioka in Japan count?
You could say the Veryovkina Cave in Georgia is the biggest room in the world, if you define a room as a single continuous enclosure not impeded by any barriers or gates. It's referred to as the Mount Everest of caves and has six points of entry once thought to be unrelated. My best friends are cave hobbyists (my body isn't ready as they say, though to be fair neither are theirs for different reasons), seeing/capturing never before things all the time, and are probably evading the law that far below our overworld right now.
A mushROOM!
Armillaria ostoyae fungus, also known as the honey fungus, is the world largest organism and covers over 2300 acres!
https://en.wikipedia.org/wiki/Armillaria_ostoyae
Another specimen in northeastern Oregon's Malheur National Forest is possibly the largest living organism on Earth by mass, area, and volume – this contiguous specimen covers 3.7 square miles (2,400 acres; 9.6 km2) and is colloquially called the "Humongous fungus".
Uses
The species is considered a choice edible.
Hmmm. Apparently in national forests in Oregon you can harvest up to a gallon of mushrooms for personal use at one time, no permit required, though you're not allowed to sell or barter it.
...that's kind of amazing that anyone can just go out and eat part of the largest organism on earth.
thanks dad
Anytime, champ!
There's no room in that room.
What are you talking about? There's so mush room!
Yer mum's rectum!
Nah I don't know
That's a hallway, not a room.
A hallway is a kind of room.
Does a factory count? If so... https://en.m.wikipedia.org/wiki/Boeing_Everett_Factory
The NASA Vehicle Assembly Building is also a contender.
I'm not sure how many dividing walls there are inside Everett, but the VAB is basically one massive empty skyscraper.
Boeing Everett Factory
checks
Volume: 13.3 million m³
That being said, I don't know if it is internally divided.
There's a really large cave in Southeast Asia somewhere.
kagis
The Sơn Đoòng cave in Vietnam:
Formed in Carboniferous/Permian limestone, the main Sơn Đoòng cave passage is the largest known cave passage in the world by volume – 3.84×10⁷ m³ (1.36×10⁹ cu ft), according to BCRA expedition leader Howard Limbert. It is more than 5 kilometres (3.1 mi) long, 200 metres (660 ft) high and 150 metres (490 ft) wide.
So that'd be nearly triple the volume of the Everett Factory. Though the cave has two holes in its roof, and I don't know exactly how you define "room" here.
They had to change their venting and airflow system for that building after it formed a cloud and rained inside. When your room can have weather systems, I feel you've entered a whole new category of 'room' by definition.
It is sorta internally divided, but there are places where you can see from one end to the other (about a mile).
Factories will win this hands down, especially when you're building large/complex items. It looks like the distinction might be "single building" vs "complex or buildings", but VW's Wolfsburg plant is 70 million square feet. The largest plant I've been to isn't on that list, but it's still over a half mile wide - all under a single roof.
I went looking but couldn't find a reference. US Air Force Plant 4 in Fort Worth (where the F-35 is assembled) was at one point the longest length building without internal support columns. I've been told that there is a twin building somewhere else, but the one in Texas is 25 feet longer. I just can't find a source with the number!
One common answer is the Vehicle Assembly Building at Kennedy Space Center which is mainly one really tall room.
It also has the largest garage door on it.
Interesting question. Are we talking about the volume or the floor area? For volume maybe a church? Then St. Peter's Basilica in Vatican City would be the largest. I don't know the layout though, but I assume a large portion of it is the main "room".
Or do stadium with a roof count? Then maybe one of these?
Edit: I don't think I really thought this through. I was thinking too much of more roomy rooms. Most convention centers probably have larger exhibition halls.
Probably volume altho i suppose I'm probably taking it for granted that a volumetrically massive room would also have massive floor space
Stadium with a roof doesnt count
The one inside your mind..
NASA's VAB is kinda big
There was this really big imax in this town I lived in once. Can't imagine much bigger than that
I have in my hand a tiny 1cm square hollow cube. I define the inside of the cube the "outside" so my room contains everything else in the universe.
That's all fine and good until someone comes along with a 9mm cube.
Nice to meet you, Wonko the Sane.
