Follow a team of experts as they solve the enduring mystery of exactly where Hannibal and his troops crossed the Alps to launch a surprise attack on Rome.

Follow a team of experts as they solve the enduring mystery of exactly where Hannibal and his troops crossed the Alps to launch a surprise attack on Rome.

2014, Turkey. A normal survey flight over Lake Iznik unexpectedly reveals the sunken remains a 4th century basilica. The discovery prompts scientists to probe the elusive history and geology behind the demise of the church that was built in ancient Nicaea -- now known as Iznik. When was the basilica destroyed? How did the basilica get swallowed up by Lake Iznik? And what happened to its community? Spanning the globe, this investigation follows a world-renowned team in this underwater excavation. Thanks to exclusive access to the site, including critical aerial and underwater cinematography, and spectacular CGI, we time travel through the centuries, back to the Roman and Byzantine time, and at the foundation of Christianity itself.

2014, Turkey. A normal survey flight over Lake Iznik unexpectedly reveals the sunken remains a 4th century basilica. The discovery prompts scientists to probe the elusive history and geology behind the demise of the church that was built in ancient Nicaea -- now known as Iznik. When was the basilica destroyed? How did the basilica get swallowed up by Lake Iznik? And what happened to its community? Spanning the globe, this investigation follows a world-renowned team in this underwater excavation. Thanks to exclusive access to the site, including critical aerial and underwater cinematography, and spectacular CGI, we time travel through the centuries, back to the Roman and Byzantine time, and at the foundation of Christianity itself.

2014, Turkey. A normal survey flight over Lake Iznik unexpectedly reveals the sunken remains a 4th century basilica. The discovery prompts scientists to probe the elusive history and geology behind the demise of the church that was built in ancient Nicaea -- now known as Iznik. When was the basilica destroyed? How did the basilica get swallowed up by Lake Iznik? And what happened to its community? Spanning the globe, this investigation follows a world-renowned team in this underwater excavation. Thanks to exclusive access to the site, including critical aerial and underwater cinematography, and spectacular CGI, we time travel through the centuries, back to the Roman and Byzantine time, and at the foundation of Christianity itself.

Uncover new archaeological evidence at Tintagel that suggests the legend of King Arthur started in a prosperous and sophisticated trading village in 5th-century Britain following the departure of the Romans.

Uncover new archaeological evidence at Tintagel that suggests the legend of King Arthur started in a prosperous and sophisticated trading village in 5th-century Britain following the departure of the Romans.

Uncover new archaeological evidence at Tintagel that suggests the legend of King Arthur started in a prosperous and sophisticated trading village in 5th-century Britain following the departure of the Romans.

The search for remains of formerly enslaved Black Union soldiers brutally murdered by angry Southerners as the Civil War was ending. Learn about Camp Nelson, KY, the military base where these soldiers and thousands got their freedom papers.

The search for remains of formerly enslaved Black Union soldiers brutally murdered by angry Southerners as the Civil War was ending. Learn about Camp Nelson, KY, the military base where these soldiers and thousands got their freedom papers.