The end only contains one strucutre, and that is the end cities, after you beat the ender dragon.
End cities can be found once after beating the ender dragon. After she is beaten, a portal appears on the edge of The End Island. It teleports you to place where End cities are found. On these outer islands, you can find chorus fruit. End citys are bueatiful purple and tan buildings with an almost japan style of building. Within these buildings you can find chest containing diamond armor, diamond tools, iron ingots, diamonds, and gold. these Buildings are littered with Shulkers, which in when they hit you with their projectiles, they make you levitate. The most wanted item on the End City, is the Elytra, which is found on the End ship, just next to a End City.