A region in the southernmost corner of China, Hong Kong is part of the southeastern Pearl River estuary, neighbouring on Mount Nanling in the north and South China Sea in the south. Local topography is hilly with scattered coastal plains. The Hong Kong SAR comprises Hong Kong Island, Kowloon Peninsula, the New Territories which is connected to Mainland China, Lantau Island and more than 200 outlying islands. Approximate total land area is 1,104 square kilometres.

Hong Kong has a myriad of landforms. The long, sinuous coastline is indeed a natural geological gallery, featuring spectacular landforms and rock formations shaped by waves and weathering. Here, one finds wave-cut sea cliffs, sea caves, sea arches, geos, sea stacks, notches and blowholes. Lying alongside are beaches, alluvial plains and mudflats which have come about thanks to millions of years of sedimentation. Inland areas showcase a variety of weathering characteristics. Terrain features arising from physical, chemical or biological weathering effects are prominent across peaks and valleys, ravines and escarpments.