TOP TEN ARCHAEOLOGY FINDS

Archaeologists Victoria Rojas (front) and Lara Hindersten (back) work at a site in the village of Tahtzibichen, in Mérida, the capital of Mexico's Yucatán state, on April 12, 2008.

Mexican archaeologists announced in August the discovery of a maze of stone temples in underground caves, some submerged in water and containing human bones.

Ancient Maya Indians likely considered the construction a portal for dead souls to pass into the underworld, scholars say.

Coverage of the find was National Geographic News's most viewed archaeology story of 2008.

Photograph by Tammara Thomsen/HO/Reuters

--National Geographic