If we had to pick one hotel from this year's list for conferences, this would be it. The largest JW Marriott in the U.S., with one of the biggest Marriott ballrooms in the world, this property anchors the $450 million Marriott Place, a development of five of the brand's hotels connected to the Indiana Convention Center. Just steps from museums, the zoo and White River State Park, this property features 100,000 square feet of event space, 1,005 guest rooms with floor-to-ceiling windows and three excellent dining venues — Tavern on the Plaza, High Velocity and Osteria Pronto, serving Tuscan-style cuisine in a relaxed setting.