While there is a 2012 National Geographic series also titled America's Lost Treasures , it only ran for one season. The "S4E17" designation refers specifically to the The UnXplained episode. America's Lost Treasures - TV's The UnExplained
You can currently find the episode on various streaming platforms: Available for purchase or with a subscription. Philo: Part of their on-demand library. [S4E17] America's Lost Treasures
Often available via the official app or website with a cable login. While there is a 2012 National Geographic series
Occasionally available through their Freestream service. [S4E17] America's Lost Treasures
Investigates whether stories of stolen gold, piracy, and hidden fortunes are merely tall tales or if these valuables are still waiting to be found.