Tuen Mun, in the West New Territories, is developed mainly on land reclaimed from Castle Peak Bay and on platforms formed in the valley between Castle Peak and the Tai Lam Hills. About 1200 hectares of land have been provided for development.

• 屯门位于新界西部，发展主要集中在青山湾填海区及青山与大榄山之间的谷地，发展用地大约已有1200公顷。