Aerial archaeologists use laser imaging to capture a distinct star-shaped pattern carved into the marsh of a Florida swamp; experts investigate and reveal a lost Civil War fort linked to an extraordinary community with a tragic past.

Aerial drone imaging captures a circular man-made structure that appears to be centuries-old in the remote forests of Aydin Province in western Turkey. Experts investigate a lost ancient Roman amphitheater with a history steeped in gladiatorial bloodshed.