Much like Green Hill Zone, Seaside Hills' soil is brown and comes in checker patterns rather than layers.
These hint of an ancient civilization that had been established on the sea in the past. These ruins come in the form of roads, platforms, flags, temples, and large palaces. It is also known for various sea ruins (some of which move when a person gets close to them) that are made of white stone with red patterns on them. It also possesses many cliffs and passages, and has various islands just outside the coast in the shape of whales. It is very tropical in nature, complete with palm trees and lush green grass covering the tops of its various trademark hills. Seaside Hill is a costal area with white sand beaches, blue oceans inhabited by orcas, a nearly clear blue sky, and a bright sun.
