Militants from the Ansar Dine group, which controls much of northern Mali, have started to destroy Timbuktu's ancient tombs.

UNESCO: World Water Assessment Programme (WWAP)

Antiquities Minister Muhammad Ibrahim reopened the Pyramid of Chefren (Khafre) and six ancient tombs at Giza after a long restoration project.

BBC: Egypt reopens Pyramid of Chefren to tourists

The fabled city includes ancient tombs and wooden structures dating to the 15th century, a major part of its cultural heritage.

CNN: Broken limbs, torn lives in northern Mali

According to researchers, while many modern pets may look like those depicted in ancient Egyptian tombs or Roman mosaics, extensive cross-breeding through thousands of years has meant that no modern dog breeds can be truly classified as "ancient".

BBC: Modern dogs have 'little in common' with ancient breeds

Visitors go to see ancient temples and tombs, and travel sites often recommend the hot air balloon trips.

CNN: Official: Egypt balloon explosion probe can take 2 weeks