Galle Fort, a UNESCO World Heritage Site, originally built by the Portuguese and then further developed by the Dutch and the British, covers nearly four sq kms, and is protected by 12 bastions and connecting ramparts. During the early 18th century the Old Dutch Gate was the entrance point to the Fort. Subsequently the British built the Main Gate which is still used today. Buildings of interest include the Dutch Reformed Church, All Saints Church, Amangalla Hotel (formerly the New Oriental Hotel), the lighthouse and bell tower. The Dutch also developed what was then an innovative tide-based sewage-system within the Fort.
A maze of narrow roads lined with small houses and shops with Dutch names still remain. Recently, a spate of old colonial houses within the Fort have been attractively renovated and made into exquisite boutique villas and hotels retaining the colonial architectural features including arches and columned courtyards, verandas, and high ceilings.