Amity Colosseum

Amity Colosseum is the location of the Vytal Festival tournament. It is designed as a levitating arena that makes the journey to each Kingdom every time the festival is held in one of the four Kingdoms.

It is a technological marvel built from the resources and contributions of all four Kingdoms, designed to match the increase in skill for the competing Huntsmen, and as a symbol of harmony between the four Kingdoms.

Trivia

 * Amity means "a friendly relationship," signifying that the arena represents the bond between all of the four Kingdoms.
 * During the World of Remnant episode in which it appears, the four kingdoms are assigned colors to represent them. These could possibly be used to deduce which parts were built by which kingdom: white - Atlas, blue - Mistral, orange - Vacuo, green - Vale.