In Chaucer's Canterbury Tales, where are the pilgrims heading and what contest does the host propose to the travelers?

The pilgrims are head to Canterbury..... to the shrine of Thomas a Becket. The Host proposes they pass the time by telling tales on their journey both going and returning, after which, he will judge which tale was the best. The winner of the contest would be treated to dinner at the inn after the pilgrimage was over.