13th century French castles are, as a rule, generally pretty great. But if there's one thing that really spruces them up a little, it's an intricate work of art made out of salt, as evidenced by the work of Japanese artist Motoi Yamamoto, who improved this castle immeasurably with two pieces titled "Floating Garden" and "Labyrinth." The former resembles swirling ocean foam, while the latter is, as the title might suggest, a labyrinth. Both are utterly captivating.