An curved arrow pointing right. New satellite images show Egypt is building a 16-foot wall around an 8-square-mile buffer zone but has offered no explanation. More from News New satellite images ...

The images — which are widely considered to mark the birth of travel photography — were captured by the French writer and photographer Maxime Du Camp during a trip to Egypt in 1849.

The researchers claim to have discovered eight vertical cylinder-shaped structures, referred to as shafts, extending ...