What is the largest underground river system in the world?
What is the largest underground river system in the world? In karst topography, rivers may disappear through sinkholes, continuing underground. In some cases, they may emerge into daylight further downstream. The longest subterranean river in the world is the Sistema Sac Actun cave system in Mexico.
Which is the 2nd largest river of Europe?
The Danube is Europe's second longest river, after the Volga. It is located in Central and Eastern Europe, flowing through 10 countries.
Which river cuts equator twice?
Measured along with the Lualaba, the main tributary, the Congo River has a total length of 4,370 km (2,720 mi). It is the only major river to cross the Equator twice.
What is the widest river?
Depending on the geographer, the Río de la Plata may be considered a river, an estuary, a gulf, or a marginal sea. If considered a river, it is the widest in the world, with a maximum width of 220 kilometres (140 mi). NASA photo of the Río de la Plata looking from northwest to southeast.
What is the oldest river in the world?
The Finke River, which is also called Larapinta by the Aboriginal People, in central Australia is believed to be the oldest river in the world. While the Finke River's exact age is unknown, it is at least over 300 million years old and some of the oldest parts of the river may be over 340 million years old.