The latest discoveries and cutting-edge science reveal strange secrets of the mysterious lost cities. This episode is a mashup of S02E07 "Hidden City of the Incas" and S02E03 "Lost Temples of the Jungle."

The latest science and discoveries reveal new information about China's most mysterious monuments. This episode is a mashup of S01E03 "Ghosts of the Great Wall" and S02E08 "Treasures of the Terracotta Army."

New discoveries and the latest science reveal the dark secrets of some of Britain's most mysterious wonders. This episode is a mashup of S02E05 "Ghosts of Stonehenge" and S02E06 "Hunt for King Arthur's Castle."

The latest science sheds new light on the mysterious monuments once used for human sacrifice. This episode is a mashup of S01E01 "Mayan City of Blood" and S02E02 "Curse of the Blood Pyramids."

New discoveries reveal hidden secrets behind the most mysterious monuments of the Greeks and Romans. This episode is a mashup of S01E04 "Summit of the Gods" and S02E11 "Lost World of the Colosseum."

The latest science reveals new information about Egypt's most mysterious monuments. This episode is a mashup of S01E02 "Dark Secrets of the Pyramid" and S02E09 "Mystery of Egypt's Mega Temple."

New discoveries reveal the dark secrets of Egypt's greatest pharaohs. This episode is a mashup of S02E01 "Tut's Buried Secrets" and S02E04 "Secret History of the Sphinx."

The ancient city of Petra, a city carved from desert rock, has baffled experts for decades; now, new technologies resurrect the city and reveal why the spectacular civilization was suddenly abandoned.

New evidence uncovers the ancient mysteries behind the iconic Colosseum; archaeologists uncover the secret lives of the gladiators and make new discoveries that help explain the rise and sudden fall of the Roman Empire.

The Taj Mahal is one of the world's most beautiful monuments, but new investigations reveal its dark secrets; scientists uncover codes that tell a shocking story of power and betrayal, challenging everything originally known about the Taj Mahal.

The Egyptian mega-temple at Karnak was once the political power base of the ancient pharaohs and the home to strange religious rituals; new discoveries of skeletons tell a story of jealousy, betrayal, and the rise of a new religion that changed Egypt.

The Terracotta Army is one of China's greatest treasures, but there are still dark secrets surrounding this super-tomb; newly discovered artifacts reveal the soldiers' supernatural enemy, and human remains point to ancient China's violent past.

The lost city of Machu Picchu is one of the greatest mysteries in archaeology. Scientists do not know why this city in the clouds was built, but investigations into secret Inca codes and deformed skeletons might finally reveal its ultimate mystery.

Stirling Castle in Scotland could be the home of King Arthur's legendary Round Table; scientists have made a gruesome discovery at this mysterious site; a disfigured skeleton that could reveal the castle's bloody secrets and rewrite the history books.

Stonehenge is the ancient world's greatest wonder and biggest mystery. Now new discoveries are revealing its deepest and darkest secrets, showing how ancient magic, bizarre rituals, and brutal murder built this strange monument.

Recent forensic findings uncover the astonishing secrets of the world's most iconic monument, the great Sphinx at Giza. Join the extraordinary investigation as it reveals which pharaoh commissioned this colossal statue and why it was never finished.

New technologies reveal the startling truth behind the largest temple ever built, Angkor Wat; accompany experts as they uncover how this colossal structure was constructed and why one of the largest cities in the world was suddenly abandoned.

Giant pyramids at a strange site in Mexico are revealing the bloody secrets of a mysterious civilization that vanished 1,400 years ago. Little is know about this lost culture, but new discoveries are uncovering shocking evidence of human sacrifice. This is Teotihuacan, one of the largest cities in the ancient world.

New discoveries explore the dark secrets of Tutankhamun's tomb; Archaeologists are finally finding answers to its ancient riddles, showing how his untimely death, his calamitous burial, and an act of God made a minor king the most famous of them all.