Bonnetton

Bonneton is the capital of the Cap Kingdom, the first kingdom in Super Mario Odyssey. It serves as the tutorial for basic actions such as walking and capturing.

Main Story
After getting knocked off Bowser's airship, Mario lands in the Cap Kingdom with a strange, ghostly figure floating over him. Mario wakes up, sees it, and starts following it. It quickly moves away. After chasing after it enough, the ghost reveals itself, and tells Mario that its name is Cappy, and that Bowser not only took Peach, but also its sister, Tiara. Mario and Cappy decide to work together to stop Bowser.

Mario and Cappy reach Top Hat Tower, which has too high jumps to reach the top of. Cappy tells Mario to throw him at one of the frogs in the tower, and when he does, he gets sucked into the frog, and becomes the frog. This is called a Capture. Now that Mario is a frog, he can easily climb to the top.

Mario uncaptures the frog and goes to the top of the tower. The Broodals were waiting in their airship at the top of the tower, and Topper jumps out to fight him. When Mario defeats Topper, a Power Line appears, which Mario can use to go to the Cascade Kingdom.

Geography
The Cap Kingdom is a small, mostly grey kingdom with a large yellow moon. The rural land is hilly.

Central Plaza
The Central Plaza is where most Bonnetters in the area live. It has airships.

Top Hat Tower
The inside of the Top Hat Tower is white, with water. There are frogs.

Outside
Bonnetton is surrounded by fog with nothing below it. Off in the distance there are other towns, and, in one area, the Cascade Kingdom.

Trivia

 * According to the Cap Kingdom Brochure, the lamps are turned on by turning them.