Oh, that's the most beautiful castle in the whole world.

3 seconds sound clip from the The Big Heat (1953) movie soundboard.

You can hear this line at 00:23:55.394 in the Blu-ray version of the movie.

Quote context

[...]

- Get your coat.

- Sure. Only somebody will want to know why you're butting into a county case, why you don't stop annoying people, especially after you've been told once.

- You get your news fast, don't you?

- Special carrier pigeon.

- Do we still go downtown?

- No. Not today. When we do, I'll have enough answers to close this joint up.

- Tell that to your mother.

(Door Closes)

- Oh, that's the most beautiful castle in the whole world.

- It's a police station, Daddy. Just like yours.

- Hello, little bossy. Where's big bossy, huh?

- Here.

- Hello, darling.

- Hello.

- What's... Look at this. Expecting company or something?

- Al and Marge are coming to dinner.

- Come, Daddy. Help me build the roof.

[...]