"One of the lesser-visited archaeological sites in Mexico is the city of Palenque, buried deep in the thick jungles of the southern state of Chiapas. This UNESCO World Heritage Site is what remains of a stunning Maya city, which peaked between 500 and 700 C.E. One of the most important Maya cities, Palenque's most famous temple is the Temple of the Inscriptions, a massive stone temple known for its hieroglyphs. "The Temple of the Inscriptions was one of the only Maya temples that was built to house a tomb, the tomb of Pakal [Palenque's most famous ruler]," said Barnhart. "His pyramid had this amazing 20-ton sarcophagus with images of him falling into the underworld on the top. His body was covered with jewelry and gifts, and it was one of the first discoveries that told us that the Maya had these treasures." - Travel + Leisure Editors