The Arcane Area is an area in PokéPark 2: Wonders Beyond. This section is located off of the Arbor Area after you have defeated the game. It houses various Pokémon and lakes and allows you to go and awaken Reshiram and Landorus.
The largest lake is in the center of the area. It has a shrine to Landorus in the center. A dais with Reshiram is high up on a hilltop.