Nemesis Tower

Nemesis Tower is a tower owned by Carl Nesmith.

Ben 10: Ultimate Alien

 * Hero Time
 * Double or Nothing
 * Catch a Falling Star

Ben 10: Omniverse

 * Arrested Development
 * For a Few Brains More
 * The Vengers

Ben 10: Ultimate Alien
The tower first appears in Hero Time, when Captain Nemesis is having a party. This is the place where Ben fought against him as Ultimate Humungousaur and later Water Hazard.

The tower appears again in Double or Nothing, when Ben fights against Hugh, Swamps and Fridge.

The tower reappears in Catch a Falling Star, where Captain Nemesis and Jennifer Nocturne Nocturne go in search for a new armor.

Ben 10: Omniverse
In Arrested Development, it was revelaed that the Billions Tower was built next to this tower.