Petrapole is the Indian side of Petrapole-Benapole border checkpoint between India and Benapole of Bangladesh near Bongaon in North 24 Parganas district of West Bengal. Petrapole border is the only land port in south Bengal. It is also the largest land customs station in Asia.
Its about 100kms from Kolkata. So a Day ride to visit the border is worth. At the border they have started the customary flag off like Wagah Border and Visitors are allowed to watch the ceremony sitting right at the No Man's Land.
Crossing the border requires Visa approval in advance.