Setting
This is the door to Rouf's place. Which is a place outside of time and space. Rouf's door follows him. It is also how he travels around the many lands in this world.
Going through the door leads to an endless white room with other red doors set haphazardly down the endless hall. Some in clusters of 20. Others have miles and miles between them. How many? The trick is, you can only pick one door to leave out of, and there's no knowing where or when it will lead, or how long it will be that you encounter such an opportunity again. So choose your doors wisely.