Ton and tons of ideas
These are some good ideas: https://homehacks.co/40-ways-to-upcycle-old-doors/
Amira: here are some great ideas!
Here are some more ideas: https://www.bobvila.com/slideshow/10-new-uses-for-old-doors-44384#for-more
Desk top? My friend just made a big desk top out of a door. Crafting area if you don't need a desk? Potting bench?