Which UNESCO World Heritage Site is a tropical botanical garden in Singapore?

The UNESCO World Heritage Site that is a tropical botanical garden in Singapore is the Singapore Botanic Gardens.

The present gardens were established in 1859 by the Singapore Agri-horticultural Society at Tanglin, although an earlier botanical and experimental garden had operated on Government Hill from 1822. Today, the gardens cover roughly 82 hectares and combine public parkland with major collections, research facilities, and conservation work.

The site became a UNESCO World Heritage Site in 2015. It was recognized for its historical role as a tropical botanical institution and for its contributions to plant science, horticulture, and regional economic development. In particular, the gardens were central to research and experimentation that helped expand rubber cultivation in Malaya in the late nineteenth and early twentieth centuries.

The National Orchid Garden, located within the larger site, is one of its best-known attractions and contains more than 1,000 orchid species and about 2,000 hybrids. Gardens by the Bay is a separate Singapore attraction and is not the UNESCO-listed botanical garden. The Singapore Botanic Gardens is notable as the first tropical botanic garden inscribed on the World Heritage List.