From the pyramids in Egypt, through the Mayan cities in South America, and up to ancient sites in Israel, archaeologists are struggling to find underground cavities,” said Professor Oded Lipschitz.

The ancient Egyptians didn't want tomb robbers to pilfer treasures in the pyramids, so how did they stop thieves?

CAIRO, Egypt (CNN/CNN Newsource/WKRC) - Egyptians used a hydraulic lift to build the oldest pyramid. Scientists are floating a new idea on how Egypt's oldest pyramid was built more than 4,000 years ...

TEOTIHUACAN, Mexico (Reuters) - More than a decade after Sergio Gomez began excavating a tunnel under a towering Mexican pyramid, the archeologist still spends most of his time studying the massive ...

Researchers explore a tunnel in Teotihuacan last accessed 1,800 years ago. April 28, 2013— -- Mexican archeologists discovered three previously unknown chambers under a pyramid in Teotihuacan, an ...