The striking Kawah Ijen volcano in Indonesia is known for emitting what appears to be blue lava as soon as the sun sets.

After lying hidden beneath meters of volcanic rock and ash for 2,000 years, a lavish spa complex has been unearthed in the ancient Roman city of Pompeii in Italy. CNN’s Ben Wedeman reports.

Throughout the 1950s, aircraft designers around the world began developing a unique aircraft configuration, called a ...