You don't even need a cat to know that most cat trees are f* ugly.
All you have to do is walk down the street and peek into a few windows. They're usually covered with ugly beige carpet and placed near the window, so the cat has a view. Unfortunately that means the neighbors do, too.
But mount Everyday Studio's cat tree on a wall near your window and your neighbors will think you a collector of minimalist sculpture.
Constructed from heavy-duty steel in sophisticated colors (plus bubblegum pink), the cat tree has replaceable corrugated cardboard sides for your kitty to shred.
$75 from Velocity.