Season 5 - Episode Guide

The Nazca Lines are mysterious, alien-looking symbols carved into the remote Nazca Desert in southern Peru more than a thousand years ago, and new discoveries might finally reveal what these strange images mean and if they explain the disappearance of the people who made them.

The Empire State Building is one of the wonders of the modern world, and cutting-edge tech helps experts explore it like never before, revealing the secrets of its construction and the mysteries hidden deep in its foundation.

New discoveries reveal the scandals and secrets of Nero and the Domus Aurea, his lost palace; and using cutting-edge technology, experts might confirm if the infamous emperor burned down Rome so he could build this golden wonder.

The Lighthouse of Alexandria in Egypt is one of the world's original Seven Wonders, but it could have been home to a mysterious superweapon, and using cutting-edge tech, experts investigate the secrets of this fabled death ray and its long-lost home.

The lost Roman city of Baiae, situated on the northwest shore of the Gulf of Naples, was the Las Vegas of the ancient world -- until a mysterious calamity caused it to sink into the sea. New discoveries reveal the secrets of this sin city that, like Pompeii, some experts believe was destroyed by a supervolcano.

New discoveries might lead investigators to the legendary group of 300 Spartan warriors who died fighting off one million invading Persians, and using cutting-edge tech, experts reconstruct the lost battlefield at Thermopylae to uncover the secrets of their last stand.

The Dead Sea Scrolls are one of the Holy Land's greatest mysteries, but new discoveries might finally reveal the hidden meaning behind the strange texts, and as experts get closer to unmasking their author, they find clues of an ancient apocalypse.

The Iceman, Ötzi, is the world's oldest and most perfectly preserved mummy, and brand-new cutting-edge forensic technology is revealing his darkest secrets; these discoveries could change everything we know about Copper Age Europeans who lived 5,000 years ago.