The correct answer is - Mexico.
Teotihuacan is located near the capital of Mexico, Mexico city, just northeast of it. It is the biggest pre-Aztec archaeological site in the Mezoamerican region. This site is under the protection of UNESCO, and has the status of World Heritage Site.
Teotihuacan has lot to offer, and is a well preserved ancient site. It connects the temple of the supreme God Quetzalcoatl, with the Pyramid of Sun, and the Pyramid of the Moon. There's a museum specially dedicated for the findings from this site, and there's tons of pottery and bones that witness for the life at this place in the past.
The european Union was established in 1993
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