The tower

The tower is the tallest structure in the game currently, with a hat at the top of it. The tower has a long and annoying set of lava jumps spiraling up to the top of it. While not hard, it's annoying to pass.

Trivia

 * The tower is the tallest existing structure, overlooking everything.
 * At the top, resides the Absolute Unit hat.
 * Using Dragon eliminates the need of jumping.