One must know which all points he will be interested in carrying out in Europe.
Europe can be anything seeing monuments made in 14th Century to bathing in springs.
Europe is divided in two parts East and West
West is more expensive than East
Wherever you visit in Europe a sincere request to you dont miss on Museums, Modern site of that place as you would miss that place for big time.
Some journeys are covered once in a life time.
For an Indian what I really missed was potable water where ever I traveled in Europe got to know the value of water.