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

It was an Aladdin's cave disguised as a cluttered seaside relic; sophisticated communications interception devices worth £175,000; radio frequency jammers; covert cameras hidden in smoke detectors, a pen, sunglasses, even men's ties; a horde of fake identity documents and equipment to make more.

From BBC

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

An earlier court case in 2014 heard from one victim - who visited Denning's home in Winchester in Hampshire in the 1970s - and described it as an "Aladdin's cave" full of pornographic magazines.

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