This world has the coolest stuff: the Legendary Zenith, a Stardust Set, and a Drill-Containing Module. There's also a Dryad for the "Excellent Deliverance!" quest, and 0 Corruption and Crimson.

Installation instructions:

Download the file
Move it to This PC/Windows/Users/[Username]/Documents/My Games/Terraria/Worlds/
Launch the "UNKNOWN WORLD" world.
That's it.

Author: Ill-manneredKonnor