Providing professional-caliber performances, free to the public, for the cultural enrichment of Houston’s diverse communities and visitors to this great city. Fresh air. First-rate entertainment. Absolutely FREE! Houston's Miller Outdoor Theatre in Hermann Park is unique in the United States, offering an 8 month season of professional entertainment that is artistically excellent, culturally diverse and always FREE of charge to the public. This is the largest "always free" program of its kind in the country.