D'Horizon Mas is a vivacious organization run by Andy and Marlene Williamson. - The Husband and wife team, originated from Trinidad, San Juan bagatelle Road and have been affiliated with Trini Revelers for over ten years. D' Horizon has been on the Carnival scene for about 12 years. It has grown to be one of the biggest Mas bands in Boston. Our illuminating mas bring life to the streets of Boston on Carnival day. D'Horizon does not only represent one island, it represents every island, big and small, as far as the eyes can see, on the horizon.