Archaeologists unearth a long-lost box of treasures from inside Tutankhamun's tomb; new technology reveals why this boy king's resting place remained hidden from tomb robbers for thousands of years; a team is tasked with transporting Tut's treasures.

A dramatic find reveals ancient, state-sanctioned tomb robbery on an industrial scale.

Archaeologists find evidence about how ancient Egyptians prepared for the afterlife; a pharaoh's tomb reveals the sacred text needed to secure life after death; mummified remains reveal the lengths to which grave robbers went in search of treasure.

Archaeologists investigate Hatshepsut, one of the greatest female pharaohs in history; a discovery inside one of Hatshepsut's quarries sparks an investigation which leads to the temple of Karnak; an archaeologist excavates mummy parts.

Archaeologists hunt for Queen Cleopatra's lost tomb; underwater archaeologists explore sunken ruins; a team takes mummies to the hospital to scan for hidden treasure; an archaeologist discovers a secret tunnel network at a forgotten temple.

An investigation into why the great pharaohs of Egypt abandoned the pyramids of Giza and chose a secret cemetery in the Valley of the Kings in which to be buried; a team looks for clues to identify human remains found in looted graves.

Some of the world's famous relics have secrets behind them that contribute to their complete stories. "Secrets" explores the mysteries relating to some of these historic landmarks to reveal the truths behind them. The latest research and forensic techniques are used to find out the stories behind the fabled cities, monuments and remnants featured on the show. Episodes include Egyptian historians on a mission to decode the mysteries of the Great Sphinx, archeologists unearthing secrets of Richard III, and an investigation into whether the bust of Nefertiti is real or a hoax.

Unlocking ancient Egypt's greatest mysteries.

Experts use modern technology to digitally strip back vegetation to uncover lost Mayan sites.