Archaeologists have discovered ancient altars and inscribed marble slabs submerged along the Italian coast near Naples. The finds are likely the remains of a 2,000-year-old temple built by immigrants from Nabataea, an ancient kingdom on the Arabian Peninsula whose rock-carved "Treasury" featured in "Indiana Jones and the Last Crusade."

However, the elaborate temple was later buried with a mix of concrete and broken pottery, possibly due to foreign traders leaving the area, according to a study published Sept. 12 in the journal Antiquity.