Find out about the race to build Paris' most famous landmark when two men vied to be the first to build a monument 1,000 feet tall. See how one man's vision transformed the Paris skyline, making the Eiffel Tower a global icon. Dramatic recreations, official renderings and personal correspondence tell the story.

Find out if one of history's greatest cold cases—the imprisonment of two princes in the Tower of London—can finally be solved. Their disappearance led to centuries of mystery and speculation. Were the boys murdered by their uncle, the notorious King Richard III? Or was it a massive conspiracy to hide the truth?