N-COUNT
黑洞洞的大厦(或大房间)
If you describe the inside of a building or a room as a cavern, you mean that it is very large and, usually, dark or without much furniture.
例句
The kitchen now is a dark cavern, with an antiquated black stove in a corner.
厨房现在黑洞洞的，角落里有只破旧的黑色炉子。