Aladdin's cave

British  

noun

1. a place containing fabulous riches

2. a place where something is abundant

   an Aladdin's cave of presents for children

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Example Sentences

Any useful parts from Hebridean Isles will end up in a large CalMac warehouse in Gourock - an Aladdin's cave of ferry equipment that is used to keep the fleet going.

From BBC

“It was really like an Aladdin’s cave of homeware. People enjoyed exploring there,” Saunders said.

From Los Angeles Times

So after he died in January 2022 with no heirs, the speculation began: What would happen to the collections he had amassed over the decades and squirreled away in his homes in White Plains, N.Y., and Durham, N.C., an Aladdin’s cave of artifacts that represented a certain style of luxury in the second half of the 20th and early 21st centuries?

From New York Times

Or AllArts, an Aladdin’s cave of Bollywood film posters and lobby cards.

From New York Times

Even with construction in full swing, it was like entering an Aladdin's Cave of music.

From BBC