Argentina's Iguazu Falls In the indigenous guarani language of Argentina, the term "Iguazú" means "great waters." The falls were discovered in 1541 by Alvar Núñez Cabeza de Vaca.

Vietnam's Halong Bay Vinh Ha Long means "Bay of the Descending Dragon." The bay is known for its calm waters and the thousands of limestone mountains of all different sizes that loom up from the glassy seascape.

The Amazon Rainforest The Amazon Rainforest spreads across eight nations' territories in South America, though most of it lies in Brazil. The Amazon represents most of the world's rainforests, and so it plays a vital role in the planet's health as its trees absorb harmful carbon emissions released by developing nations. However, extensive logging in the forest is eroding the Amazon's ability to mitigate global pollution.

South Korea's Jeju Island Jeju is South Korea's southernmost region. Its volcanic rock has been carved into fantastical shapes by the wind and water. The island is also known for its Dolhareubang, or stone statues, that dot the landscape.

Philippines' Puerto Princesa Underground River The Puerto Princesa Underground River flows for 5 miles (8.2 km) through a limestone landscape that connects to the South China Sea. The river supports a diverse ecosystem, including birds, various mammals and 13 different types of forest trees.

South Africa's Table Mountain Table Mountain overlooks Cape Town and is a popular tourist attraction. The mountain was formed by many layers of sandstone that have been worn away by the elements.

Indonesia's Kimodo On Kimodo, its Kimodo Dragon inhabitants are guarded over by its 2,000 residents almost religiously, which is thought to be the reason the dragons have thrived on the island. The island's residents, many descended from convicts who were once sent there, leave out food for the reptiles. Kimodo dragons can live up to 50 years.