Built in 491, Xuankong Si is built onto a sheer precipice at the foot of Hengshan.

Supported fifty metres off the ground by just a few pillars, it also notable for combining elements of Buddhism, Taoism and Confucianism.

First described by the English explorer Sir Walter Raleigh in 1596, its 31 sq km summit area is defended by 400-metre-tall cliffs on all sides.

The mountain includes the triple border point of Venezuela, Brazil and Guyana.

Don your snorkel and gently float along this crystal clear river.

The warm water is clear enough to see both the fishes and snakes below and the macaws and butterflies above.