Our new Earth Expo & Convention Center offers more than 175,000 sq. ft. of open, column-free exhibit space, along with 15 flexible meeting rooms, pre-function areas and more. Discover over 100,000 sq. ft. of flexible meeting space, including the 38,000 sq. ft. pillar-free Uncas Ballroom, 20 meeting rooms and nearly 5,000 sq. ft. of pre-function space. Mohegan Sun is owned by the Mohegan Tribe of Connecticut and guided by four key principles that define who we are and how we treat each other.