Wigger (river)
The Wigger( formerly also called" Wiggeren") is a river in the Swiss cantons of Lucerne and Aargau.
It is an important tributary of the river Aare.
The Wigger is around 41 kilometers long and flows from south to north for most of its length.
The largest city in the Wigger valley is Zofingen.
The river rises from the north slope of the Napf in the canton of Lucerne near the border to the canton of Berne in a height of about 1300 meters.
There it is called Enziwigger.
It flows through a narrow valley towards Hergiswil bei Willisau where the valley widens and flattens.
Shortly after the small city of Willisau it joins with the Buchwigger and is called just Wigger from there.
The valley widens further to a flat and broad plain.
North of Dagmersellen the Wigger is mostly restricted to a canal bed and flows partially parallel to the A2 motorway.
Between Reiden and Brittnau it crosses the border to Aargau.
It flows into the Aar between Rothrist and Aarburg at a height of 395 meters.
Tributaries of the Wigger are the Seewag, the Wanger- Rot, the Ron, the Luthern and the Hürnbach.
In 1821 the Wigger's course was corrected( channelized) by order of the government of the canton of Aargau.
Until the second half of the 19th century the area of the Wigger's confluence with the Aar was a location of placer mining for gold, but this stopped due to dissatisfactory yield.
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Cephissus (Athenian plain)
Cephissus(" Kifisos") is a river flowing through the Athens agglomeration, Greece.
The" Bibliotheca"( 3.15.1) declares that Erechtheus' wife Praxithea was daughter of Phrasimus( otherwise unknown to us) by Diogenia( otherwise unknown to us) daughter of Cephissus.
The source of the river is in the saddle between the Parnitha and Penteli mountains.
From there it flows generally southwest until it reaches the Phaleron Bay between Neo Faliro and Moschato.
Today the river flows near or under the Motorway 1 linking Athens and Thessaloniki for much of its length.
This section of Motorway 1 is named" Kifissou Avenue", and is home to the Kifissos Bus Terminal.

Question: Are Cephissus (Athenian Plain) and Wigger (River) located in the same country?
Answer: no