They oughta take that crazy rainbow phlegm you HACK up and put it in a museum, you cancerous chain-smoking freak!!
This museum has an extensive collection, with over ten specialized exhibits.
a natural history museum or aerospace museum. (fine-art museums are 美術館 （びじゅつかん））
a GIANT exposition. Not like, "Cezanne's greatest fuckin' paintings all up in here festival" but huger - like a World's Fair.
To break it down:
博覧会 (biggest kind of expo )
展覧会 （てんらんかい＝art exhibition)
|薄||weak or thin||WATER||水|
You tie up with STRING,
but WATER is a weak-tasting thing.
Museums are TEN times more extensive than galleries and etc.