Top contributor OOO Photography created this stunning drone video of one of Mexico's best-known Pre-Columbian ruins sites. It's called El Tajín, and it's located near the port city of Veracruz. The city here was one of the most important in the region from about 600 to 1200 AD. Best known for its pyramids, it's been a UNESCO World Heritage site since 1992. Incredibly, it's believed that the ruins were unknown to Europeans until 1785, amost three centuries after Mexico was conquered by Spain.