Mysterious, pyramid-like structures spotted in the Egyptian desert by an amateur satellite archaeologist might be long-lost pyramids after all, according to a new investigation into the enigmatic mounds.

Angela Micol, who last year found the structures using Google Earth 5,000 miles away in North Carolina, says puzzling features have been uncovered during a preliminary ground proofing expedition, revealing cavities and shafts.

"Moreover, it has emerged these formations are labeled as pyramids on several old and rare maps," Micol told Discovery News....