Aladdin's cave
noun
chiefly British
: a place containing a vast collection of unusual objects
… we found a strange two-storey barn-like building … with a below-street-level Aladdin's cave of dusty old furniture, much of it from the 1920s and 30s …
Stephen Joyce, In Britain, April 1974
Stephen Joyce, In Britain, April 1974
Word History
Etymology
from the cave in a traditional Middle Eastern tale of Aladdin and the magic lamp
First Known Use
1854, in the meaning defined above