The Singapore Zoo, formerly known as the Singapore Zoological Gardens or Mandai Zoo, is a 28 hectares zoo located on the margins of Upper Seletar Reservoir within Singapore's heavily forested central catchment area. It is operated by the Mandai Wildlife Group, which also manages the neighbouring Night Safari, River Wonders, Bird Paradise as well as the forthcoming Rainforest Wild Park.

River Wonders, formerly known as River Safari, is a river-themed zoo and aquarium located in Mandai, Singapore, it forms a part of the Mandai Wildlife Reserve, consisting of the Singapore Zoo, Night Safari and Bird Paradise and the upcoming Rainforest Wild Park. It is built over 12 hectares and nestled between its two counterparts, the Singapore Zoo and the Night Safari, Singapore. It is the first of its kind in Asia and features freshwater exhibits and a river boat ride as its main highlights. The safari was built at a cost of S$160m, with an expected visitor rate of 820,000 people yearly.