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Lule, Dal and Ume are the principal rivers of which country?

Sweden. They all drain into the Gulf of Bothnia.

We all know that the mighty Danube runs through some of Europe's most beautiful and historic capitals. In which order would you encounter them by traveling west to east?

Vienna, Budapest, Belgrade. The Danube is one of the most significant commercial waterways on the European continent. Vienna is the capital of Austria, Budapest of Hungary, and Belgrade of Serbia. Bucharest is the capital of Romania but is located about 40 miles from the Danube.

The Kama, Samara, and Oka are tributaries of what important river?

The Volga, in Russia. More than 200 tributaries merge with the Volga, including the Kama, Samara and Oka. In fact, the Volga and its tributaries occupy a watershed covering almost 41 per cent of the European landmass.

A river horse is a hippopotamus, but what's a river jack?

An unpleasant-looking snake. A river jack is an African puff adder (Clotho nasicornis) which has a spine on its nose. An alewife is a river herring, a river duck is any non-seagoing duck, and certain crocodiles are known as river dragons. (Definitions from dictionary.com.)

Rivers run down under, too. Who named a Queensland, Australia river after his ship?

Captain James Cook (Endeavour River). Cook named the Endeavour River after his ship when it struck a reef off Cooktown on 11 June 1770 and required two months of repairs at the river's mouth. Darwin explored much of the globe aboard the Beagle from 1831-1836, including a stop in Australia. The Britannia was the British royal family's private yacht from 1953-1997, and John Oxley was an early explorer in New South Wales.

All of these rivers flow north into the Arctic Ocean, but which has the largest delta?

Lena River. The Lena River Delta, largest in the Arctic, occupies 32,000 square kilometers. The Ob and the Lena run through Siberian Russia, the Pechora through northern European Russia, and the Mackenzie through Canada.

These rivers named after people run through magnificent Canada. Put them in order from shortest to longest. (Hint: the shortest and longest are the two named after men who explored Canada.)

Fraser, Churchill, Nelson, Mackenzie. Okay, this was a mean one. But it could have been worse. I was tempted to organize the rivers by the dates on which their namesakes died. Yikes! Here are the lengths: Mackenzie 4241 km, Nelson 2575 km, Churchill 1609 km, and Fraser 1370 km. Both Mackenzie and Fraser were early Canadian explorers. (Information from "The Atlas of Canada".)

The Chao Praya river runs through Bangkok and is used for many purposes, both practical and ceremonial. What does "Chao Praya" mean in Thai?

River of Kings. The Chao Praya is 365km long, and flows through the center of Bangkok before reaching the Gulf of Thailand . Its name means River of Kings. Bangkok, interestingly enough, is usually translated as City of Angels.

The source of the mighty Amazon is in which country?

Peru. In 1953, the source of the Amazon was discovered to be a small stream rising in the Andes mountains of Perú.

And finally, in case you were expecting a quiz about the movie "A River Runs Through It": What was the river where parts of the film were shot?

Boulder River, Montana. Yes, there's plenty of fly fishing there, and it's near Yellowstone Park, too. I hope you have enjoying running through some rivers with me.