A sacred tunnel discovered in the ancient Mexican city of Teotihuacan is filled with 50,000 ritual objects and may lead to royal tombs.

The entrance to the 1,800-year-old tunnel was first discovered in 2003, and its contents came to light thanks to excavations by remote-control robots and then human researchers, archeologist Sergio Gomez told reporters.

The site is located about 30 miles (50 km) northeast of Mexico City.
Two of the sculptures unearthed by investigators at the Teotihuacan archeological site in Mexico. Mexican archaeologists have concluded a yearslong exploration of a tunnel sealed nearly 2,000 years ago at the ancient city of Teotihuacan and found 50,000 relics.
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Two of the sculptures unearthed by investigators at the Teotihuacan archeological site in Mexico. Mexican archaeologists have concluded a yearslong exploration of a tunnel sealed nearly 2,000 years ago at the ancient city of Teotihuacan and found 50,000 relics.
A sculpture unearthed at the Teotihuacan archeological site in Mexico. The city reached its peak between 100 B.C. and 650 B.C. witha population as large as 200,000, growing rich from awide-ranging trade in obsidian that in pre-Colombian times wasused to make knives and other weapons.
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A sculpture unearthed at the Teotihuacan archeological site in Mexico. The city reached its peak between 100 B.C. and 650 B.C. witha population as large as 200,000, growing rich from awide-ranging trade in obsidian that in pre-Colombian times wasused to make knives and other weapons.
Deep: This picture released by the National Institute of Anthropology and History shows part of the tunnel and offerings found inside the Temple of the Feathered Serpent (Serpiente Emplumada) at the Teotihuacan complex in Mexico City

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Deep: This picture released by the National Institute of Anthropology and History shows part of the tunnel and offerings found inside the Temple of the Feathered Serpent (Serpiente Emplumada) at the Teotihuacan complex in Mexico City

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