The entrance to the tomb of a Mayan ruler at the ruins of the Mayan city of Palenque in the hills of the southern Mexican state of Chiapas is seen in this undated handout photo by the National Institute of Anthropology and History (INAH) released June 23, 2011. A tiny remote-controlled camera peered inside the tomb that has been sealed for 1,500 years, revealing red frescoes, pottery and pieces of a funerary shroud made of jade and mother of pearl. Archeologists had not been able to access the vault discovered in 1999 inside a pyramid among the ruins until now, the INAH said in a release on Thursday. REUTERS/INAH/Handout (MEXICO - Tags: SOCIETY TRAVEL) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS