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On any given day, the orange and green Old Town Trolley Tour buses crisscross Boston and provide passengers with narrated tours of historic Beantown. On Saturdays and Sundays in January through April, however, the topic turns to cacao beans when choc-aholics board the trolley company's Boston Chocolate Tour.

The three-hour excursion stops at the Prudential Center's Top of the Hub for a panoramic view of the city and a scrumptious dessert (featuring chocolate, of course), the Parker House for its famous Boston Cream Pie (topped with chocolate, naturally), and the Langham Hotel for its ultra-decadent chocolate bar (with enough tortes, cookies, bon-bons, and other treats to send the most seasoned dessert connoisseur into a diabetic coma).

While en route to the restaurants, the trolley conductor fills passengers in on the history of chocolate, with a special nod to some local tidbits. Who knew, for example, that the country's first chocolate was manufactured in Dorchester, or that the nation's first chocolate drink, hot fudge sundae, and Toll House cookie were all served in Massachusetts?

Want to see some of the sinful desserts available on the Chocolate Tour? Check out my photo gallery.

Boston Chocolate Tour
Saturdays and Sundays in January through April
$65 per person
Reservations required.
617-269-7010