The Amazon river is the largest and the second longest river in the world. It is so huge that it covers six countries, Peru, Colombia, Brazil, Bolivia, Venezuela, and Ecuador. It has the largest drainage basin in the world and accounts for approximately one fifth of the world’s total river flow.

During the dry season, the river covers and area of 110,000 square kilometers, while in the wet season the area rises to 350,000 square kilometers. At its widest point the Amazon River can be 11 kilometers wide during the dry season and 45 kilometers wide during the wet season.

Amazon river is also home to one of the world’s largest fishwater fish, the Pirarucu. Sadly, this fish is dwindling in numbers due to over fishing. Here’s a video of a study funded by the National Geographic.

The Chinese city of Guilin is home of the Guilin Mountains – the spectacular misty mountains in all shapes and sizes that rises out of the water to form dramatic settings. These mist-shrouded limestone mountains was carved by the Li River. Today, the city of Guilin attracts innumerable tourists because of its unique landscape. Until the end of the 1970s, it was a quiet, sleepy area. Since then, Guilin and the settlements along the Li River have undergone an incredible development through tourism.

The Jeita Grotto of Lebanon is a compound of crystallized caves located 20 km north of Beirut, Lebanon in the Valley of Nahr al-Kalb or Dog River. This grotto complex is composed of two caves – the upper galleries and lower cave. The upper galleries was discovered in 1958 by Lebanese speleologists, while the lower cave where an underground 6230-meters-long river runs was discovered in 1863 by Reverend William Thomson. The grotto complex was nominated in the New Seven Wonders of the World.

The cave and galleries is home to one of the biggest stalactites in the world hanging 8,20 meters from the ceiling. Carved from the limestone by water are cathedral-like vaults with various sizes, colors and shapes. The cave is more than 9000 meters in length and 108 meters in height from the ceiling to the water level.