Looking for Cool Ideas for a 404 Page

Hey. I wanna impress my boss with a cool idea for our current (pretty shitty) 404 page. It's in Danish, so I don't expect anyone to help with text and stuff. But any design ideas or just creative spit-balls of pretty much any kind, I'm all ears.

Here's the site: https://hoeks.dk/

Here's the current 404 page: https://hoeks.dk/something

Lemme pick thine brains!

Thank you!