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.

[2] It is the first of its kind in Asia and features freshwater exhibits and a river boat ride as its main highlights.

[5] This tank and aviary displays various species of smaller fish like tetras, danios and gouramis, and birds like violet turacos and Von der Decken's hornbills.

[12] This area has elephantnose fish, eastern bottlenose, giraffe catfish and Atlantic tarpons.

The Congo River area consists of a pond containing various Lake Malawi cichlids, ringed teals, and crowned hornbills in a paludarium setup.

Themed after a Hindu temple, the area features gharials and a tank for clown knifefish and goonch.

A tank replicating a mangrove forest houses a variety of Australasian fish like Australian lungfish and banded archerfish.

Nearby is a smaller enclosure for mudskippers and a former touch pool which now houses mangrove horseshoe crabs.

There is also an aviary based on a rice paddy field in Thailand with painted storks, black-faced spoonbills, rufous night herons and spotted whistling ducks.

[15] Rare species such as a false gharial, Chinese high-fin banded sharks and sturgeons are kept in this area.

Initially, the area also had the Squirrel Monkey Forest featuring a walkthrough squirrel monkey habitat but in 2023, it was renamed Amazonian Wonders and now houses Azara's agoutis, macaws, white-faced sakis and yellow-footed tortoises.

In August 2016, two young male manatees named Junior and Kai were released into a protected bay in Guadeloupe to participate in a breeding programme.

One of the main attractions is a pair of male and female giant pandas – Kai Kai (凯凯) and Jia Jia (嘉嘉)[22] – which are housed in a specially constructed climate-controlled enclosure which change throughout the four seasons emulating their original environment.

[47] The park's boat ride, the Amazon River Quest, was opened to visitors on 7 December 2013.

Tickets are priced at S$5 for adults and S$3 for children aged three to 12, on top of River Wonders admission.

[51][52] The Mandai Shuttle service plies daily between Khatib MRT station and the Zoo.

[53] A separate service, the Mandai Express, operates on selected weekends and holidays to and from three locations in Bedok, Sengkang, and Tampines.