Unused Minecraft IP ideas?

I was wondering if anyone had any Minecraft server ip ideas that I could use (I will give full credit) If anyone one has an idea, what I'm looking for is an ip that is not used and it could have a theme (for example Hivemc.eu has bees as a sort of theme type) If you want to leave an idea please do but do not put the end of it like.com or.net or.org. Any help would be nice, thanks.