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Cano Cristales is a Colombian river located in the Serrania de la Macarena, province of Meta. The river is commonly called "The River of Five Colors," "The Liquid Rainbow" or even "The Most Beautiful River in the World" due to the algae produced colors like red, yellow, green and blue at the bottom of the river giving it a unique appearance. For most of the year, Caño Cristales is indistinguishable from any other river: a bed of rocks covered in dull green mosses are visible below a cool, clear current. The River of Five Colors

Moon Valley is one of the most visited in the Chapada dos Veadeiros in the town of Alto Paraíso de Goiás . It is a set of rock formations carved in the rocks by the rapids of clear waters of the river San Miguel . It is outside the National Park Serra da Boa Vista, in a valley that becomes very dangerous during the rainy season due to sudden downpours. The name comes from the Valley of the Moon that resemble a landscape looks lunar , with small craters dug by the friction of the sand carried by the water with the rocks in the corners where the rapids are stronger, giving rise to small eddies and funnels. It is located 11 km from St. George by highway GO-239, entering by a dirt road opposite the National Park. Pays a small charge at the entrance guides but are not required. Valley of the Moon

Consisting of eight geographical clusters of protected areas within the boundaries of the Three Parallel Rivers National Park, in the mountainous north-west of Yunnan Province, the 1.7 million hectare site features sections of the upper reaches of three of the great rivers of Asia: the Yangtze (Jinsha), Mekong and Salween run roughly parallel, north to south, through steep gorges which, in places, are 3,000 m deep and are bordered by glaciated peaks more than 6,000 m high. The site is an epicentre of Chinese biodiversity. It is also one of the richest temperate regions of the world in terms of biodiversity. Three Parallel Rivers of Yunnan Protected Areas

The Puerto Princesa Subterranean River National Park is located about 50 km north of the city of Puerto Princesa, Palawan, Philippines. It features a limestone karst mountain landscape with an 8.2 km. navigable underground river. A distinguishing feature of the river is that it winds through a cave before flowing directly into the South China Sea. It includes major formations of stalactites and stalagmites, and several large chambers. The lower portion of the river is subject to tidal influences. The underground river is reputed to be the world’s longest. Puerto Princesa Underground River

Jeita Grotto is a compound of crystallized caves in Lebanon located 20 km north of Beirut in the Valley of Nahr al-Kalb (Dog River). This grotto is made up of two limestone caves, upper galleries and a lower cave through which a 6230 m long river runs. Geologically, the caves provide a tunnel or escape route for the underground river. In this cave and galleries, the action of water in the limestone has created cathedral-like vaults full of various sizes, colors and shapes of stalactites and stalagmites, majestic curtains and fantastic rock formations. Jeita Grotto