National Geographic recently published an article about a Maya tomb at Palenque, which was discovered in 1999. In late November, researchers from Mexico’s National Institute of Anthropology and History entered the tomb for the first time. Last summer, NatGeo published photographs of the temple, which was explored remotely using a small camera (1.6 x 2.4 in.) pushed through a 6 in. hole.
Temple 20 at Palenque contains a royal tomb, well-preserved murals, 11 vessels, and pieces of jade and shell. Because the temple has been inaccessible for so long, its contents are well-preserved. At this point, researchers are not certain who the tomb belongs to.
Images from National Geographic: Entrance to Temple 20, Palenque; “Snake Jaguar” King