The following are just suggestions for some possible sightseeing tours; the service charges are to be paid by the speaker/participant directly to the travel agents and transport agencies.
If you have at least 3 days for sightseeing, we recommend AGRA (http://wikitravel.org/en/Agra#Taj_Mahal), the city of Taj Mahal(*), Agra Fort(*) and Fatehpur Sikri (*),
OR
KHAJURAHO (http://wikitravel.org/en/Khajuraho) (*),
OR
the Holy twin cities of VARANASI (http://wikitravel.org/en/Varanasi) and SARNATH (http://wikitravel.org/en/Sarnath). All these places are accessible from KANPUR by road and the entire trip will take not more than 3 days.
If you are looking for an exciting week-long vacation, then we recommend
EITHER the desert province of Rajasthan (http://wikitravel.org/en/Rajasthan)
(contact: Rajasthan tourism)
OR
the hills of Uttarakhand (http://wikitravel.org/en/Uttarakhand)
(contact: Uttarakhan tourism)
both of which are accessible from Kanpur by road.
If you have only a day for sightseeing, then you should not miss Lucknow (http://wikitravel.org/en/Lucknow); you can reach the heart of Lucknow from the airport in just half an hour.
Finally, if you have no time at all for sightseeing, do not miss Qutb Minar (*), Humayun's tomb (*) and, in the evening, the light-and-sound program at RED FORT(*) in Delhi (http://wikitravel.org/en/New_Delhi) on your way to Kanpur.
The web site "incredible India" (http://www.incredibleindia.org) may be useful in planning pleasure travel within India.
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(*) UNESCO World Heritage Site