Rivers

The rivers Havel, Dahme and Spree run through Berlin.

Otters can be found in unpolluted waters all over the world in marshland, freshwater rivers, lakes, oceans and coastlines.

Most species of otters actually spend their time on the banks of rivers and other bodies of water when they're not hunting.

This means that even though it usually lives on the land, it spends a great amount of time in rivers and lakes where males lead groups of 5 to 30 females and young.

The city is crossed by two rivers: the Tiber, which runs from east to west, and l'Aniene, which runs from north east to north – within the city, it flows into the Tiber.

Otherwise, snow typically melts seasonally, causing runoff into streams and rivers and recharging groundwater.

The city is between the rivers of Llobregat and Besòs, and south of the Pyrenees mountains.