They Start in.....
panama
The source is Will Narr in North West England and ends where it joins the River Douglas.
It straddles the River Thames between north and south London.
where does pearl river end
North River Railway ended in 1881.
North River Railroad ended in 1881.
The River Rhine begins in the Swiss Alps and flows north through several cities before reaching the North Sea. Key cities along its course include Basel, Strasbourg, Mannheim, and Cologne. It concludes its journey at the Dutch city of Rotterdam, where it empties into the North Sea. Thus, the cities that start and end at the River Rhine are Basel and Rotterdam.
There is no 'river UK' !
The start of a river is its headwaters and, just in case you were wondering, the end is its mouth.
North Sea
North American Company ended in 1946.
North Sea at Sunderland.