Some 1,600 years ago, the Temple of the Night Sun was a blood-red beacon visible for miles and adorned with giant masks of the Maya sun god as a shark, blood drinker, and jaguar.
Long since lost to the Guatemalan jungle, the temple is finally showing its faces to archaeologists, and revealing new clues about the rivalrous kingdoms of the Maya.
The sides of the temple are decorated with 5-foot-tall (1.5-meter-tall) stucco masks showing the face of the sun god changing as he traverses the sky over the course of a day. Despite the obvious care that was taken to construct and preserve the newfound temple, it wasn't used for long. Evidence at the site suggests the building was abandoned sometime in the fifth century, for reasons unknown. (Source)