Watch Tuesday, July 30, 2013 at 9pm | Long before the days of giant theme parks, the United States had many amusement parks where families gathered for a cool escape on a hot summer day.

Watch Monday, July 29, 2013 at midnight | Explore autism from the point of view of three autistic people: child, teenager and adult.

Watch Wednesday, July 24, 2013 at 9pm | Discover the previously untold story of air photo intelligence that played a vital role in defeating Hitler.

Watch Tuesday, July 23, 2013 at 10pm | Join historian Charles Allen to solve the mystery of bones reputed to be those of the Buddha.

Watch Monday, July 22, 2013 at midnight | Trail two of China’s first citizen-reporters as they document the underside of rapid development.

Watch Sunday, July 21, 2013 at 2pm | Hearst Tower redefined the modern skyscraper and pioneered a sustainable architectural vision for the 21st century.