We booked two tours while in New Orleans- Garden District and the French Quarter. The Garden District tour was just o.k., and not through Viator. The French Quarter tour was amazing (and through Viator)- our guide, Gabriella skillfully led us though a history lesson while highlighting the incredible architecture. Her knowledge combined with natural storytelling made 2 hours fly by. If you're looking for a more academic-like tour, I can't recommend her enough.