A secret tomb with skeletons was discovered in one of the Seven Wonders of the World (photos, videos available).

Even long-established wonders of the world may harbor undiscovered secrets. A team of researchers uncovered a secret tomb containing 12 skeletons at a UNESCO World Heritage site in Petra, which is regarded as one of the seven modern wonders of the world.

This unexpected discovery was highlighted in a new documentary by Discovery Channel. The Treasury (Al-Khazneh) in Petra serves as the centerpiece of an entire city carved into the walls of a desert canyon by the inhabitants of the Nabatean kingdom 2000 years ago. This location is widely recognized from the film "Indiana Jones and the Last Crusade." The true purpose of the Treasury remains a mystery.

A joint Jordanian-American project, led by the executive director of the American Center of Research (ACOR), Professor Pierce Paul Christien, has received a highly rare permit to conduct ground-penetrating radar scans. The study revealed potential underground chambers within and around the Treasury.

Scientists believe that the tomb was likely constructed as a mausoleum or crypt in the Nabatean kingdom in the early first century AD. Almost all tombs in Petra have been found empty, so the discovery of such a large number of skeletons, pottery, and other artifacts could shed light on the history of the Nabateans.

Previously, "Telegraph" reported that a unique jade dragon was unearthed in China. Its age is estimated to be 5000 years.