What were the three worlds in M.C. Escher's painting?

M.C. Escher's painting "Three Worlds" features a unique interplay of three distinct realms: the water, the reflections on the water's surface, and the land above. The top part of the artwork depicts a serene landscape with trees and a distant horizon, while the middle section captures the mirrored reflection of the trees in the water. The bottom layer presents the actual water, creating a surreal blend of reality and illusion. This composition invites viewers to contemplate the relationship between different perspectives and the nature of perception itself.