There are more than 50 rivers with lengths over 2000 km. Only 3 rivers exceed 6000 km in length and only 2 are more than 5000 km long.

The top 10 longest rivers are :-

Waterfalls

Waterfalls occur when the level of a river channel changes so suddenly that the flow of the water is caused to drop vertically or almost vertically. Five of the world's 10 tallest waterfalls are in Norway. South America has the claim for the tallest waterfall.

The top 10 tallest waterfalls are :-

Lakes and Seas

The world lake is generally used to describe slow-moving or standing water occupying an island basin. Some large lakes containing salt water are referred to as seas viz. the Dead Sea and the Caspian Sea.The word sea is also used to name areas of water around the margins of the oceans.

The top 10 fresh water lakes are :-

The top 10 largest seas are :-

1. South China Sea
2. Caribbean Sea
3. Mediterranean Sea
4. Bering Sea
5. Gulf of Mexico
6. Sea of Okhotsk
7. East China Sea
8. Hudson Bay
9. Sea of Japan
10. Andaman Sea

The Deserts

Deserts are regions which are very hot, very dry and where there is very little or no vegetation.

The top 10 Deserts are :-

1. Sahara
2. Australian
3. Arabian
4. Gobi
5. Kalahari
6. Turkestan
7. Takla Makan
8. Sonoran
9. Namib
10. Thar